Publications Blatt Lab - Quantum Optics and Spectroscopy
2025
Preprints
- Bounded-Error Quantum Simulation via Hamiltonian and Lindbladian Learning arXiv:2511.23392
- Robust certification of non-projective measurements: theory and experiment arXiv:2511.04446
- Spin-Locking Spectroscopy of Harmonic Motion arXiv:2510.08732
- Controlling the spontaneous emission of trapped ions arXiv:2501.08627
Articles
- Verifiable measurement-based quantum random sampling with trapped ions Nat. Commun. 16, 106 (2025).
- Measuring full counting statistics in a trapped-ion quantum simulator PRL 135, 160601 (2025).
- Test and Characterization of Multilayer Ion Traps on Fused Silica Advanced Quantum Technologies , (2025).
- Controlling the spontaneous emission and entanglement of quantum scatterers via modulated reflection of their emitted photons New J. Phys. , (2025).
- Symmetry-Protected Topological Haldane Phase on a Qudit Quantum Processor PRX Quantum , (2025).
- Simulating 2D lattice gauge theories on a qudit quantum computer Nature Phys. 21, 576 (2025).
- Backaction suppression for levitated dipolar scatterers URL
2024
Preprints
- Experimental measurement and a physical interpretation of quantum shadow enumerators doi:10.48550/arXiv.2408.16914
- Constructing the spin-1 Haldane phase on a qudit quantum processor doi:10.48550/arXiv.2408.04702
- Demonstration of two-dimensional connectivity for a scalable error-corrected ion-trap quantum processor architecture arXiv:2406.02406
- Back action suppression for levitated dipolar scatterers arXiv:2402.04802
Articles
- Characterization of ion-trap-induced ac magnetic fields Phys. Rev. A 110, 63101 (2024).
- Motional-state analysis of a trapped ion by ultranarrowband composite pulses Phys. Rev. A 110, 53103 (2024).
- Mpemba‐Effekt in einem Quantensimulator: Quantenphysik , (2024).
- Demonstration of fault-tolerant Steane quantum error correction PRX Quantum 5, 030326-19 (2024).
- Observing the quantum Mpemba effect in quantum simulations PRL 133, 10402 (2024).
- Multimode Ion-Photon Entanglement over 101 Kilometers PRX Quantum 5, 20308 (2024).
- Correlation Spectroscopy with Multiqubit-Enhanced Phase Estimation Phys. Rev. X 14, 24 (2024).
- Towards experimental classical verification of quantum computation Quantum Sci. Technol. 9, (2024).
Reports
- MQV K6 Site Visit Erlangen , (2024).
- MQV Site Visit THEQUCO K4 , (2024).
- MQV Site Visit TAQC K3 , (2024).
2023
Preprint
- Single-ion optical autocorrelator arXiv:2312.03679
Articles
- Reconstructing Complex States of a 20-Qubit Quantum Simulator PRX Quantum 4, 40345 (2023).
- Exploring Large-Scale Entanglement in Quantum Simulation Nature 624, 539 (2023).
- Observation of magnon bound states in the long-range, anisotropic Heisenberg model Phys. Rev. X 13, 031017-12 (2023).
- Verifiable measurement-based quantum random sampling with trapped ions arXiv:2307.14424
- Sideband thermometry of ion crystals PRX Quantum 4, 40346 (2023).
- A telecom-wavelength quantum repeater node based on a trapped-ion processor Phys. Rev. Lett. 130, 213601 (2023).
- Experimental observation of thermalization with noncommuting charges PRX Quantum 4, 20318 (2023).
- Controlling two-dimensional Coulomb crystals of more than 100 ions in a monolithic radio-frequency trap PRX Quantum 4, 20317 (2023).
- Native qudit entanglement in a trapped ion quantum processor URL
- Quantum-enhanced sensing on optical transitions through finite-range interactions Nature 621, 740 (2023).
- Approaching optimal entangling collective measurements on quantum computing platforms Nature Phys. , 1-7 (2023).
Report
- 2023 MQV Review Meeting , (2023).
2022
Articles
- Experimental single-setting quantum state tomography PRX Quantum 3, 40310 (2022).
- Characterizing Quantum Instruments: From Nondemolition Measurements to Quantum Error Correction PRX Quantum 3, 30318 (2022).
- Experimental Bayesian calibration of trapped ion entangling operations PRX Quantum 3, 20350 (2022).
- Demonstration of fault-tolerant universal quantum gate operations Nature 605, 675 (2022).
- rf-induced heating dynamics of noncrystallized trapped ions Phys. Rev. A 105, 33101 (2022).
- Relaxation times do not capture logical qubit dynamics Quantum 6, 632 (2022).
- Controlling long ion strings for quantum simulation and precision measurements Phys. Rev. A 105, 52426 (2022).
- Observing emergent hydrodynamics in a long-range quantum magnet Science 376, 720 (2022).
- Probing phases of quantum matter with an ion-trap tensor-network quantum eigensolver Phys. Rev. X 12, 41035 (2022).
- Optimal metrology with variational quantum circuits on trapped ions Nature 603, 604 (2022).
- Industrially Microfabricated Ion Trap with 1 eV Trap Depth Quantum Sci. Technol. 7, 35015 (2022).
Reports
- MQV Scientific Report 2022 , Mitgliederversammlung von Munich Quantum Valley e.V. , (2022).
- Third Meeting of the Dioscuri Committee in the 4th Call for DCs in PL , (2022).
2021
Preprints
- Experimental Bayesian calibration of trapped ion entangling operations arXiv:2112.01411
- Demonstration of fault-tolerant universal quantum gate operations arXiv:2111.12654
- A universal qudit quantum processor with trapped ions arXiv:2109.06903
- RF-induced heating dynamics of non-crystallized trapped ions arXiv:2104.10623
Articles
- Versatile fidelity estimation with confidence PRL 133, 020402-1 (2021).
- Position measurement of a dipolar scatterer via self-homodyne detection Phys. Rev. A 104, 53523 (2021).
- Verification of independent quantum devices Phys. Rev. X 11, 31049 (2021).
- Measuring ion oscillations at the quantum level with fluorescence light Phys. Rev. Lett. 127, 63603 (2021).
- A compact ion-trap quantum computing demonstrator PRX Quantum 2, 20342 (2021).
- Heating of a Trapped Ion Induced by Dielectric Materials 126, 230505 (2021).
- Electric field noise in a high-temperature superconducting surface ion trap Phys. Rev. B 104, 64513 (2021).
- Interface between Trapped-Ion Qubits and Traveling Photons with Close-to-Optimal Efficiency PRX Quantum 2, 20331 (2021).
- Motion analysis of a trapped ion chain by single photon self-interference Appl. Phys. Lett. 119, 24003 (2021).
- Ultraviolet Laser Pulses with Multigigahertz Repetition Rate and Multiwatt Average Power for Fast Trapped-Ion Entanglement Operations Phys. Rev. Applied 15, 24054 (2021).
- Entangling logical qubits with lattice surgery Nature 589, 224 (2021).
2020
Preprint
- Relaxation times do not capture logical qubit dynamics arXiv:2012.07911
Articles
- Indistinguishable photons from a trapped-ion quantum network node Phys. Rev. A 102, 52614 (2020).
- Ultra-fast two-qubit ion gate using sequences of resonant pulses New J. Phys. 22, 103024 (2020).
- Polarization-gradient cooling of 1D and 2D ion Coulomb crystals New J. Phys. 22, 103013 (2020).
- The Panopticon device: an integrated Paul-trap-hemispherical mirror system for quantum optics Review of Scientific Instruments (Online) 91, 113201 (2020).
- Two-dimensional linear trap array for quantum information processing Advanced Quantum Technologies 3, 2000031 (2020).
- Efficient ion-photon qubit SWAP gate in realistic ion cavity-QED systems without strong coupling Opt. Express 28 , 11839 (2020).
- Probing surface charge densities on optical fibers with a trapped ion New J. Phys. 22, 63018 (2020).
- Experimental deterministic correction of qubit loss Nature 585, 207 (2020).
- Coherent rotations of qubits within a multi-species ion-trap quantum computer Phys. Rev. A 102, 22611 (2020).
- Quantum information scrambling in a trapped-ion quantum simulator with tunable range interactions Phys. Rev. Lett. 124, 240505 (2020).
- Cross-Platform Verification of Intermediate Scale Quantum Devices Phys. Rev. Lett. 124, 10504 (2020).
Diploma Thesis
- Single-atom-focused laser for photon generation and qubit control , (2020).
Dissertations
- Ultrafast Coherent Excitation of a 40Ca+ Ion , (2020).
- Towards ion-lattice quantum processors with surface trap arrays , (2020).
- Ultrafast Coherent Excitation of a 40Ca+ Ion URL
2019
Articles
- Characterizing large-scale quantum computers via cycle benchmarking Nat. Commun. 10, 5347 (2019).
- MEMS-based design of a high-finesse fiber cavity integrated with an ion trap Phys. Rev. Applied 12, (2019).
- Light-matter entanglement over 50 km of optical fibre URL
- "Wavelength-scale errors in optical localization due to spin–orbit coupling of light Nature Phys. 15, 21 (2019).
- Ultrafast coherent excitation of a Ca+ ion New J. Phys. 21, 83025 (2019).
- Self-verifying variational quantum simulation of lattice models Nature 569, 360 (2019).
- Statistical correlations between locally randomized measurements: a toolbox for probing entanglement in many-body quantum states Phys. Rev. A 99, 52323 (2019).
- Cluster State Generation with Spin-Orbit Coupled Fermionic Atoms in Optical Lattices Phys. Rev. Lett. 122, 160402 (2019).
- Frequency measurement of the 1S0,F=5/2 to 3P1,F=7/2 transition of 27Al+ via quantum logic spectroscopy with 40Ca+ New J. Phys. 21, 103003 (2019).
- Probing Renyi entanglement entropy via randomized measurements Science 364, 260 (2019).
- Ion-Based Quantum Sensor for Optical Cavity Photon Numbers Phys. Rev. Lett. 122, 153603 (2019).
- Environment-assisted quantum transport in a 10-qubit network Phys. Rev. Lett. 122, 50501 (2019).
- Observation of superconductivity and surface noise using a single trapped ion as a field probe Phys. Rev. A 99, 23405 (2019).
Report
- Excellence Strategy University of Heidelberg , (2019).
2018
Articles
- Energy exchange between atoms with a quartz crystal μ-balance New J. Phys. 20, 123001 (2018).
- Experimental quantification of spatial correlations in quantum dynamics Quantum 2, 90 (2018).
- Quantum chemistry calculations on a trapped-ion quantum simulator Phys. Rev. X 8, 31022 (2018).
- Interference of Single Photons Emitted by Entangled Atoms in Free Space Phys. Rev. Lett. 120, 193603 (2018).
- Observation of Entangled States of a Fully Controlled 20-Qubit System Phys. Rev. X 8, 21012 (2018).
2017
Articles
- Assessing the Progress of Trapped-Ion Processors Towards Fault-Tolerant Quantum Computation Phys. Rev. X 7, 41061 (2017).
- Efficient tomography of a quantum many-body system Nature Phys. 13, 1158 (2017).
- Micromotion-enabled improvement of quantum logic gates with trapped ions New J. Phys. 19, 113038 (2017).
- U(1) Wilson lattice gauge theories in digital quantum simulators New J. Phys. 19, 103020 (2017).
- Polarisation-preserving photon frequency conversion from a trapped-ion-compatible wavelength to the telecom C-band Appl. Phys. B Las. Opt. 123, 228 (2017).
- Deterministic quantum state transfer between remote qubits in cavities Quantum Sci. Technol. 2, 45003 (2017).
- Direct observation of dynamical quantum phase transitions in an interacting many-body system Phys. Rev. Lett. 119, 80501 (2017).
- Quantum repeaters based on trapped ions with decoherence-free subspace encoding Quantum Sci. Technol. 2, 44001 (2017).
- Experimental quantum compressed sensing for a seven-qubit system Nat. Commun. 8, 15305 (2017).
2016
Articles
- In-line polarization rotator based on the quantum-optical analogy Opt. Lett. 41, 2113 (2016).
- Real-time dynamics of lattice gauge theories with a few-qubit quantum computer Nature 534, 519 (2016).
- Cryogenic setup for trapped ion quantum computing Review of Scientific Instruments (Online) 87, 113103 (2016).
- Pure single photons from a trapped atom source New J. Phys. 18, 93038 (2016).
- Compiling quantum algorithms for architectures with multi-qubit gates New J. Phys. 18, 63029 (2016).
- Cryogenic resonator design for trapped ion experiments in Paul traps Appl. Phys. B Las. Opt. 122, 157 (2016).
- Iterative phase optimization of elementary quantum error correcting codes Phys. Rev. X 6, 31030 (2016).
- Electromagnetically-induced-transparency ground-state cooling of long ion strings Phys. Rev. A 93, 53401 (2016).
- Can different quantum state vectors correspond to the same physical state? An experimental test New J. Phys. 18, 13007 (2016).
- Electric-field noise above a thin dielectric layer on metal electrodes New J. Phys. 18, 23020 (2016).
- Operation of a planar-electrode ion-trap array with adjustable RF electrodes New J. Phys. 18, 23047 (2016).
- Realization of a scalable Shor algorithm Science 351, 1070 (2016).
2015
Articles
- Ion-trap measurements of electric-field noise near surfaces Rev. Mod. Phys. 87, 1419 (2015).
- Enhanced Quantum Interface with Collective Ion-Cavity Coupling Phys. Rev. Lett. 114, 023602 (2015).
- Sympathetic cooling and detection of a hot trapped ion by a cold one New J. Phys. 17, 103001 (2015).
- Measurement of dipole matrix elements with a single trapped ion Phys. Rev. Lett. 115, 143003 (2015).
- Spectroscopy of interacting quasiparticles in trapped ions Phys. Rev. Lett. 115, 100501 (2015).
2014
Preprints
- Cryogenic silicon surface ion trap arXiv:1403.5208
- Operation of a planar-electrode ion trap array with adjustable RF electrodes arXiv:1402.0791
Articles
- Quantum information transfer using photons Nature Photon. 8, 363 (2014).
- Quantum computations on a topologically encoded qubit Science 345, 305 (2014).
- Quasiparticle engineering and entanglement propagation in a quantum many-body system Nature 511, 202 (2014).
- Experimental Violation of Multipartite Bell Inequalities with Trapped Ions Phys. Rev. Lett. 112, 100403 (2014).
- Generalized Dicke Nonequilibrium Dynamics in Trapped Ions Phys. Rev. Lett. 112, 023603 (2014).
Dissertation
- Digital quantum simulation, Schrödinger cat state spectroscopy and setting up a linear ion trap , (2014).
2013
Articles
- Integrated fiber-mirror ion trap for strong ion-cavity coupling Review of Scientific Instruments (Print) 84, 123104 (2013).
- A quantum information processor with trapped ions New J. Phys. 15, 123012 (2013).
- Measurement-based quantum computation with trapped ions Phys. Rev. Lett. 111, 210501 (2013).
- Free-space read-out and control of single-ion dispersion using quantum interference Phys. Rev. A 88, 041804(R) (2013).
- Experimental generation of quantum discord via noisy processes Phys. Rev. Lett. 111, 100504 (2013).
- Demonstration of genuine multipartite entanglement with device-independent witnesses Nature Phys. 9, 562 (2013).
- Entanglement-enhanced detection of single-photon scattering events Nature Photon. 7, 633 (2013).
- Entanglement growth in quench dynamics with variable range interactions Phys. Rev. X 3, 031015 (2013).
- Quantum simulation of open-system dynamical maps with trapped ions Nature Phys. 9, 367 (2013).
- Shot-noise-limited monitoring and phase locking of the motion of a single trapped ion Phys. Rev. Lett. 110, 133602 (2013).
- Deterministic generation of arbitrary symmetric states and entanglement classes Phys. Rev. A 87, 032325 (2013).
- Quantum-state transfer from an ion to a photon Nature Photon. 7, 222 (2013).
- Atom-atom entanglement by single-photon detection Phys. Rev. Lett. 110, 083603 (2013).
- Undoing a quantum measurement Phys. Rev. Lett. 110, 070403 (2013).
- Experimental Characterization of Quantum Dynamics Through Many-Body Interactions Phys. Rev. Lett. 110, 040603 (2013).
Issue
- Quantum simulation - an exciting adventure Ann. Phys. 525, (2013).
2012
Articles
- NOBEL 2012 Physics: Manipulating individual quantum systems Nature 492, 55 (2012).
- Compact radio-frequency resonator for cryogenic ion traps Review of Scientific Instruments (Print) 83, 084705 (2012).
- Bosonic Josephson junction controlled by a single trapped ion Phys. Rev. Lett. 109, 080402 (2012).
- Viewpoint: Moving traps offer fast delivery of cold ions Physics 5, 94 (2012).
- Guiding of Rydberg atoms in a high-gradient magnetic guide Phys. Rev. A 86, (2012).
- Quantum tomography in position and momentum space Eur. Phys. J. D 66, 222 (2012).
- Spatially-resolved potential measurement with ion crystals Appl. Phys. B Las. Opt. 107, 1125 (2012).
- Toward an ion-photon quantum interface in an optical cavity Appl. Phys. B Las. Opt. 107, 1145 (2012).
- Tunable ion-photon entanglement in an optical cavity Nature 485, 482 (2012).
- News and Views: Simulating magnetism Nature 484, 461 (2012).
- Interferometric Thermometry of a single sub-Doppler-cooled atom Phys. Rev. A 85, 043401 (2012).
- Quantum simulations with trapped ions Nature Phys. 8, 277 (2012).
2011
Articles
- Quantum simulation of quantum field theories in trapped ions Phys. Rev. Lett. 107, 260501 (2011).
- Quantum simulation of the Majorana equation and unphysical operations Phys. Rev. X 1, 021018 (2011).
- Single atom as a mirror of an optical cavity Phys. Rev. Lett. 107, 133002 (2011).
- Relativistic quantum mechanics with trapped ions New J. Phys. 13, 095003 (2011).
- Universal Digital Quantum Simulation with Trapped Ions Science 334, 57 (2011).
- Two-dimensional arrays of radio-frequency ion traps with addressable interactions New J. Phys. 13, 073043 (2011).
- Simulating open quantum systems: from many-body interactions to stabilizer pumping New J. Phys. 13, 085007 (2011).
- Spin flips of a single proton Nature 475, 298 (2011).
- Experimental repetitive quantum error correction Science 332, 1059 (2011).
- Trapped-ion antennae for the transmission of quantum information Nature 471, 203 (2011).
- 14-qubit entanglement: creation and coherence Phys. Rev. Lett. 106, 130506 (2011).
- An open-system quantum simulator with trapped ions Nature 470, 491 (2011).
- Quantum simulation of the Klein paradox with trapped ions Phys. Rev. Lett. 106, 060503 (2011).
Proceeding
- Quantum simulation of relativistic quantum physics with trapped ions 22nd International Conference on Atomic Physics (Cairns, Australia, 2010-07-25) J. Phys. Conf. Ser. 264, 012020 (2011).
2010
Articles
- QED with a spherical mirror Phys. Rev. A , 063812 (2010).
- Experimental multiparticle entanglement dynamics induced by decoherence Nature Phys. 6, 943 (2010).
- Trapped-ion probing of light-induced charging effects on dielectrics 12, 093035 (2010).
- Electromagnetically Induced Transparency from a Single Atom in Free Space Phys. Rev. Lett. 105, 153604 (2010).
- Klein tunneling and Dirac potentials in trapped ions Phys. Rev. A 82, 020101(R) (2010).
- Short-time-interaction quantum measurement through an incoherent mediator Phys. Rev. A 81, 062126 (2010).
- Ion imaging in a high-gradient magnetic guide 81, 043109 (2010).
- Quantum to classical transition in a single-ion laser Nature Phys. 6, 350 (2010).
- A single trapped atom in front of an oscillating mirror Opt. Com. 283, 765 (2010).
- Methods in Implementing 2 Dimensional Arrays of Ion Traps , (2010).
- Realization of a Quantum Walk with One and Two Trapped Ions Phys. Rev. Lett. 104, 100503 (2010).
- Compatibility and noncontextuality for sequential measurements Phys. Rev. A 81, 022121 (2010).
- Quantum simulation of the Dirac equation Nature 463, 71 (2010).
2009
Articles
- Realization of universal ion-trap quantum computation with decoherence-free qubits Phys. Rev. Lett. 103, 200503 (2009).
- Theory of cross phase modulation for the vibrational modes of trapped ions DFG - Physik, Math. u. Geowissen. 373, 422 (2009).
- Absolute frequency measurement of the 40Ca+ 4s 2S1/2 - 3d 2D5/2 clock transition Phys. Rev. Lett. 102, 023002 (2009).
- Optimal control of entangling operations for trapped-ion quantum computing Phys. Rev. A 79, 012312 (2009).
- Quantum interference from remotely trapped ions 11, 013032 (2009).
- Realization of the quantum Toffoli gate with trapped ions Phys. Rev. Lett. 102, 040501 (2009).
- Deterministic entanglement of ions in thermal states of motion 11, 023002 (2009).
- High-fidelity entanglement of 43Ca+ hyperfine clock states Phys. Rev. A 79, 020304 (2009).
- Raman spectroscopy of a single ion coupled to a high-finesse cavity 95, 205 (2009).
- Intensity-Field Correlation of Single-Atom Resonance Fluorescence Phys. Rev. Lett. 102, 183601 (2009).
- Wiring up trapped ions to study aspects of quantum information J. Phys. B: At. Mol. Opt. Phys. 42, 154012 (2009).
- State-independent experimental test of quantum contextuality Nature 460, 494 (2009).
- Deterministic single-photon source from a single ion 11, 103004 (2009).
- Deterministic reordering of 40Ca+ ions in a linear segmented Paul trap 11, 103008 (2009).
Proceedings
- Absolute frequency measurement of the 40Ca+ S1/2-D5/2 clock transition Proceedings of the 7th symposium on frequency standards and metrology 7th symposium on frequency standards and metrology (Pacific Grove, 2008-10-05) , 108 (2009).
- Ca+ quantum bits for quantum information processing Physica Scripta T137, 014008 (2009).
2008
Articles
- Ion trap quantum gates with amplitude-modulated laser beams 10, 013002 (2008).
- Dynamics of entanglement Nature Phys. 4, 97 (2008).
- Scalable continuous-variable entanglement of light beams produced by optical parametric oscillators Phys. Rev. A 77, 022311 (2008).
- Monitoring a single ion's motion via second-order photon correlations 10, 043011 (2008).
- Towards fault-tolerant quantum computing with trapped ions Nature Phys. 4, 463 (2008).
- Nonlinear coupling of continuous variables at the single quantum level Phys. Rev. A 77, 040302(R) (2008).
- Geometric phase gate on an optical transition for ion trap quantum computation Phys. Rev. A 77, 050303(R) (2008).
- Experimental quantum information processing with 43Ca+ ions Phys. Rev. A 77, 062306 (2008).
- Entangled states of trapped atomic ions Nature 453, 1008 (2008).
- The conversion of phase to amplitude fluctuations of a light beam by an optical cavity American Journal of Physics 76, 922 (2008).
- Precision measurement of the branching fractions of the 4p 2P3/2 decay of Ca II Eur. Phys. J. D 50, 13 (2008).
- Deterministic entanglement swapping with an ion trap quantum computer Nature Phys. 4, 839 (2008).
- Quantum computing with trapped ions Physics Reports 469, 155-203 (2008).
Proceedings
- "Quantum motion of a trapped ion: Schrödinger cats, ion interferometry and quantum tomography" in Proceedings of the 5th Symposium on Frequency Standards and Metrology , 20 (2008).
- Quantum information processing and Ramsey spectroscopy with trapped ions Laser Spectroscopy: Proceedings of the XVIII International Conference (ICOLS) (Telluride, USA, 2007-06-24) , 53 (2008).
- The Quantum Revolution - Towards a new generation of Supercomputers Laser Spectroscopy: Proceedings of the XVIII International Conference (ICOLS) (Telluride, USA, 2007-06-24) , 207 (2008).
2007
Articles
- Robust state preparation of a single trapped ion by adiabatic passage J. Mod. Opt. , 1541 (2007).
- Measurement of the hyperfine structure of the S1/2-D5/2 transition in 43Ca+ Phys. Rev. A 75, 032506 (2007).
- Photon Correlation versus Interference of Single-Atom Fluorescence in a Half-Cavity Phys. Rev. Lett. 98, 183003 (2007).
- Tomografie eines Quantenzustands – Verschränkung und Reinheit 124, 136 (2007).
- Universal quantum computation in decoherence-free subspaces with hot trapped ions Phys. Rev. A 75, 052337 (2007).
- Quantum teleportation with atoms: quantum process tomography 9, 211 (2007).
- High-fidelity ion-trap quantum computing with hyperfine clock states URL
- Single-ion two-photon source Phys. Rev. Lett. 99, 183001 (2007).
- Precision spectroscopy with two correlated atoms 89, 483 (2007).
- Transfer of trapped atoms between two optical tweezer potentials J. Mod. Opt. 54, 1619 (2007).
2006
Articles
- Feedback cooling of a single trapped ion Phys. Rev. Lett. 96, 043003 (2006).
- Highly charged ions, quantum-electrodynamics, and the electron mass International Journal of Mass Spectrometry 251, 152 (2006).
- Designer atoms for quantum metrology Nature 443, 319 (2006).
- Generalized spin-queezing inequalities in N-qubit systems Phys. Rev. A 74, 052319 (2006).
- Process tomography of ion trap quantum gates Phys. Rev. Lett. 97, 220407 (2006).
- Der Quantenmechanik in die Karten geschaut: Quantenbits in der Ionenfalle Physik in unserer Zeit 37, 64 (2006).
- Quantencomputer und Quantenteleportation: Quantenbits in der Ionenfalle Teil 2 Physik in unserer Zeit 37, 272 (2006).
Proceedings
- Controlling three atomic qubits Physical Realizations of Quantum Computing , 108 (2006).
- Long lived entangled states Foundations of Quantum Mechanics in the Light of New Technology ISQM-Tokyo (Tokyo, Japan, 2005-08-22) , 33 (2006).
- Precision spectroscopy with entangled states: Measurement of electric quadrupole moments Atomic physics 20 (Innsbruck, Austria, 2006-07-16) , 111-118 (2006).
2005
Articles
- Quantum information processing and communication Eur. Phys. J. D 36/2, 203 - 228 (2005).
- Scalable ion trap quantum computing without moving ions Eur. Phys. J. D 32, 201-208 (2005).
- Scalable multi-particle entanglement of trapped ions Nature 438, 646 (2005).
- Robust Entanglement 81, 151 (2005).
- New experimental and theoretical approach to the 3d ²D-level lifetimes of ⁴⁰Ca⁺ Phys. Rev. A 71, 032504 (2005).
- Transport of atoms in a quantum conveyor belt Phys. Rev. A 72, 053605 (2005).
- Ionen in Reih und Glied Physik Journal 4, Nr. 11, 37 (2005).
- Singe photons on demand from 3D photonic band gap structures 69, 945 (2005).
Proceedings
- Teleportation with Atoms Atomic Physics (Rio De Janeiro) 19, 341-349 (2005).
- Entanglement of trapped ions Laser Spectroscopy ICOLS XVII, 392 (2005).
2004
Articles
- Interfacing Quantum-Optical and Solid-State Qubits Phys. Rev. Lett. 92, 247902 (2004).
- Control and Measurment of Three-Qubit Entangled States Science 304, 1478 (2004).
- Bell States of Atoms with Ultralong Lifetimes and Their Tomographic State Analysis Phys. Rev. Lett. 92, 220402 (2004).
- Quantized AC-Stark shifts and their use for multiparticle entanglement and quantum gates 65, 587 (2004).
- Spontaneous Emission Lifetime of a Single Trapped Ca+ Ion in a High Finesse Cavity Phys. Rev. Lett. 92, 203002 (2004).
- A single-photon source based on a single Ca+ ion New J. Phys. 6, 94 (2004).
- Forces between a Single Atom and Its Distant Mirror Image Phys. Rev. Lett. 92, 223602 (2004).
- Ion Trap Quantum Computing with Ca+ Ions Quant. Inf. Proc. 3, 1-5 (2004).
- Deterministic quantum teleportation with atoms Nature 429, 734 (2004).
2003
Articles
- How to realize a universal quantum gate with trapped ions Appl. Phys. B Las. Opt. 77, 789 (2003).
- Doppler cooling a single Ca+ ion with a violet extended-cavity diode laser Appl. Phys. B Las. Opt. 76, 805 (2003).
- Precision measurement and compensation of optical Stark shifts for an ion-trap quantum processor Phys. Rev. Lett. 90, 143602 (2003).
- Realization of the Cirac-Zoller controlled-NOT quantum gate Nature 422, 408 (2003).
- The coherence of qubits based on single Ca+ ions J. Phys. B: At. Mol. Opt. Phys. 36, 623 (2003).
- Implementing the Deutsch-Jozsa algorithm on an ion-trap quantum computer Nature 421, 48-50 (2003).
- Coherence of qubits based on single Ca+ ions J. Phys. B: At. Mol. Opt. Phys. 36, 623-636 (2003).
- Vacuum-field level shifts in a single trapped ion mediated by a single distant mirror Phys. Rev. Lett. 91, 213602 (2003).
- Laser cooling of trapped ions J. Opt. Soc. Am. B 20, 1003 (2003).
- Quantum dynamics of single trapped ions Rev. Mod. Phys. 75, 281 (2003).
- Coherent coupling of a single Ca+ ion to a high-finesse optical cavity Appl. Phys. B Las. Opt. 76, 117-124 (2003).
- Continuous loading of a non-dissipative atom trap 61, 187 (2003).
- Injection of a cold atomic beam into a magnetic guide Laser Phys. 13, 605 (2003).
- Propagation of guided atoms Comm. Nonlin. Sci. Num. 8, 315 (2003).
- Quantum information Processing with Trapped Ca+ ions Phil. Trans. R. Soc. Lond. A 361, 1-12 (2003).
- Single trapped ions interacting with low- und high-finesse optical cavities Fortschr. Phys. 51, 359-368 (2003).
Proceeding
- Quantum information processing and cavity QED experiments with trapped Ca+ ions Atomic Physics 18, 253-302 (2003).
2002
Articles
- Coupling a single atomic quantum bit to a high finesse optical cavity Phys. Rev. Lett. 89, 103001 (2002).
- Optical decay from a Fabry-Perot cavity faster than the decay time J. Opt. Soc. Am. B 19, 1425-1429 (2002).
- Single photons on demand from 3D photonic band-gap structures arXiv:quant-ph/0207075
- Loading of a cold atomic beam into a magnetic guide Eur. Phys. J. D 20, 107 (2002).
Proceedings
- Laser Cooling of trapped ions Laser Physics at the limit , 243-260 (2002).
- Sideband cooling and state manipulation: Application in precision spectroscopy Proc. 6th Symp. Frequency Standards and Metrology , 376-384 (2002).
- Towards Quantum Computation with trapped Ca+ Ions Proc. of the International school of Physics Enrico Fermi, Course CXLVIII "Experimental Quantum Computation and Information" , 197-211 (2002).
2001
Articles
- Light interference from single atoms and their mirror images Nature 413, 495-498 (2001).
- Simple and efficient photoionization loading of ions for precision ion-trapping experiments Appl. Phys. B Las. Opt. 73, 861-863 (2001).
- Delicate information Nature 412, 773 (2001).
- Laser cooling with electromagnetically induced transparency: Application to trapped samples of ions or neutral atoms Appl. Phys. B Las. Opt. 73, 807 (2001).
- Sympathetic ground state cooling and coherent manipulation with two-ion-crystals J. Opt. B: Quantum Semiclass. Opt. 3, 34 (2001).
Proceedings
- Cold atoms in an amplitude modulated optical lattice - dynamical tunnelling Laser spectroscopy , (2001).
- Quantum Computation with trapped Ca+ Ions Proc. of the Dolomieu Winter School , (2001).
- Single ions interfering with their mirror images Laser Spectroscopy XV, Proc of the 15th International Conference (ICOLS01) , 193-201 (2001).
- Towards quantum information with trapped Calcium ions Quantum Communication, Computing and Measurement 3 , 179 (2001).
- Experiments towards quantum information with trapped Calcium ions Atomic Physics (Proceedings of the ICAP 2000) 17, 130 (2001).
2000
Articles
- Experimental demonstration of ground state laser cooling with electromagnetically induced transparency Phys. Rev. Lett. 85, 5547 (2000).
- Sympathetic ground state cooling and coherent manipulation with two-ion-crystals J. Opt. B: Quantum Semiclass. Opt. 3, S3 (2000).
- Push-button entanglement Nature 404, 231 (2000).
- Speed of ion trap quantum information processors Phys. Rev. A 62, 042305 (2000).
- Motional sidebands and direct measurement of the cooling rate in the resonance fluorescence of a single trapped ion Phys. Rev. Lett. 85, 538 (2000).
- Investigating a qubit candidate: Spectroscopy on the S1/2 to D5/2 transition of a trapped calcium ion in a linear Paul trap Phys. Rev. A 61, 023405 (2000).
- Ground state cooling, quantum state engineering, and study of decoherence in Paul traps J. Mod. Opt. 47, 2573 (2000).
- Addressing and cooling of single ions in Paul traps Fortschr. Phys. 48, 623 (2000).
Proceedings
- Cavity QED-Experiments for Quantum Information: Atoms in Cavities and Trapped Ions The Physics of Quantum Information , 133-162 (2000).
- Linear Ion Traps for Quantum Computation The Physics of Quantum Information , 163-176 (2000).
1999
Articles
- Laser Cooling of two trapped ions: Sideband cooling beyond the Lamb-Dicke limit Phys. Rev. A 59, 003793 (1999).
- Quantum state engineering on an optical transition and decoherence in a Paul trap Phys. Rev. Lett. 83, 4713 (1999).
- Laser addressing of individual ions in a linear ion trap Phys. Rev. A 60, 145 (1999).
- Laser cooling of two trapped ions: Sideband cooling beyond the Lamb-Dicke limit Phys. Rev. A 59, 3797 (1999).
- Diode laser spectrometer at 493 nm for single trapped Ba+ ions (erratum) 69, 253 (1999).
Proceedings
- Motional effects in the fluorescence spectrum of a single Ba+ ion Laser Spectroscopy XIV, 346 (1999).
- Single ions in Paul traps Laser Spectroscopy XIV, 246 (1999).
- Single Ions in Paul traps Decoherence: Theoretical, Experimental and Conceptual Problems , (1999).
1998
Articles
- Coherent excitation of normal modes in a string of Ca+ ions Opt. Express 3, 89 (1998).
- Diode laser spectrometer at 493 nm for single trapped Ba+ ions Appl. Phys. B Las. Opt. 67, 683 (1998).
- Ion strings for quantum gates Appl. Phys. B Las. Opt. 66, 603 (1998).
Proceeding
- Trapped Ions for Quantum Gates and Cavity QED Laser Spectroscopy XIII, 183 (1998).
1997
Article
- Random networks of crosslinked manifolds J. Phys. A: Math. Gen. 30, 1967 (1997).
1996
Articles
- Quantum tricks in ion traps Physics World 9 (6), 25 (1996).
- Quantengatter für Quantenrechner Physikalische Blätter 52, 205 (1996).
- Trapped ions in the strong excitation regime: ion interferometry and non-classical states Phys. Rev. A 54, 1532 (1996).
- Motion tomography of a single trapped ion Phys. Rev. A 53, R1966 (1996).
- Cooling of trapped multilevel atoms: A numerical analysis Phys. Rev. A 54, 5133 (1996).
- Non-Classical States of Motion in Ion Traps Adv. Atom. Molec. and Opt. Physics 37, 238-296 (1996).
Proceeding
- Quantum motion of a trapped ion: Schrödinger cats, ion interferometry and quantum tomography Proceedings of the 5th Symposium on Frequency Standards and Metrology , 20 (1996).
1995
Articles
- Trapping states of motion with cold ions Phys. Rev. A 52, 518–524 (1995).
- Quantum motion of trapped ions Physica Scripta T59, 294 (1995).
- Transient internal dynamics of a multi-level ion Phys. Rev. A 52, 2994 (1995).
- Quantized infrared-optical triple resonance on a single cold Barium ion 60, 473 (1995).
Proceeding
- Spectroscopy and Quantum Optics with Stored Ions Atomic Physics 14, 219 (1995).
1994
Articles
- Nonclassical states of motion in a three-dimensional ion trap by adiabatic passage Phys. Rev. A 49, R3174–R3177 (1994).
- Quantum collapse and revival in the motion of a single trapped ion Phys. Rev. A 49, 1202–1207 (1994).
- Laser cooling of trapped ions: The influence of micromotion Phys. Rev. A 49, 421–432 (1994).
- Frequency Measurement in 130Te2 near 467 nm 59, 187 (1994).
- Ion storage in the rf-octupole trap Phys. Rev. A 50, 4122 (1994).
Proceeding
- Nonclassical states of motion and quantum collapse and revival in an ion trap Quantum Optics VI in Springer Proceedings in Physics 77, 112 (1994).
1993
Articles
- Spectrum of resonance fluorescence from a single trapped ion Phys. Rev. A 48, 2169–2181 (1993).
- Laser cooling of trapped ions with polarization gradients Phys. Rev. A 48, 1434–1445 (1993).
- Cooling of a trapped ion coupled strongly to a quantized cavity mode Opt. Com. 97, 353-359 (1993).
- Preparation of Fock states by observation of quantum jumps in an ion trap Phys. Rev. Lett. 70, 762–765 (1993).
- ‘‘Dark’’ squeezed states of the motion of a trapped ion Phys. Rev. Lett. 70, 556–559 (1993).
- Microwave-Optical Double Resonance on a Single Laser-Cooled 171Yb+ Ion 24, 325 (1993).
- Motional Stability of a Nonlinear Parametric Oscillator: Ion Storage in the RF Octupole Trap 21, 183 (1993).
- Modulation-Transfer Spectroscopy in Te2 at 467 nm 57, 159 (1993).
Proceedings
- Non-classical states of motion in an ion trap Fundamentals of Quantum Optics III, 156 (1993).
- Correlations of the resonance fluorescence from a single trapped ion Fundamentals of Quantum Optics III, 146 (1993).
1992
Articles
- Laser cooling of trapped ions in a standing wave Phys. Rev. A 46, 2668–2681 (1992).
- Photon Anti-Bunching and Non-Poissonian Fluorescence of a Single Three-Level Ion Phys. Rev. Lett. 68, 3016 (1992).
- The 'Trapped State' of a Trapped Ion - Line Shifts and Shape 18, 139 (1992).
- Current Perspectives on The Physics of Trapped Ions J. Mod. Opt. 39, 193 (1992).
- Microwave Spectroscopy of Motional Sidebands in Clouds of Trapped Ions J. Mod. Opt. 39, 325 (1992).
- Resonance fluorescence from three-level atoms: Atomic coherences and squeezed light Phys. Rev. A 45, 3319 (1992).
- Kinetic energy and spatial width of ion clouds in Paul traps Appl. Phys. B54, 246 (1992).
Proceedings
- Controlling an Optical Frequency by a Single Ion Proc. 6th European Frequency and Time Forum, ESTEC, ESA SP-340 , 421 (1992).
- Precision Spectroscopy on Trapped Ions Proceedings of the 10th International Conference on Laser Spectroscopy , 65 (1992).
1991
Articles
- Self-induced Zeeman coherences in trapped Yb+ ions 53, 131 (1991).
- A 12-GHz Standard Clock on Trapped Ytterbium Ions Ann. Physik (Leipzig) 48, 41 (1991).
1990
Article
- Kinetic energy and spatial width of ion clouds in Paul traps Appl. Phys. B51, 414 (1990).
1989
Articles
- A Dye Ring Laser Spectrometer for Precision Spectroscopy 49, 251 (1989).
- Spatially Localized Optical Pumping in Paul Traps J. Opt. Soc. Am. B 6, 2159 (1989).
- Line Shape of Three-Level Ions in Paul Traps Phys. Rev. A 39, 5098 (1989).
- Population Trapping in Excited Yb+ Ions Phys. Rev. Lett. 62, 2108 (1989).
Proceedings
- Progress Towards a Frequency Standard Based on Trapped Yb+ Ions Proc. Int. Symp. on Electromagn. Metrology , (1989).
- Nonlinear Effects in Trapped Three-Level Ions Frequency Standards and Metrology , 300 (1989).
- New Frequency Standards Based on Yb+ Frequency Standards and Metrology , 306 (1989).
1988
Articles
- Quantum jumps in atomic systems European Journal of Physics 9, 250-256 (1988).
- On the Light Force upon a Single Trapped Three-Level Ion 69, 25 (1988).
- On the Photo-Dynamics of Single Ions in a Trap Z. Physik D 10, 153 (1988).
- Dynamics of Ion Clouds in Paul Traps Phys. Rev. A 38, 5121 (1988).
- Kinetics of a Single Trapped Ion: Multistability and Stimulated Two-Photon Light Force 7, 317 (1988).
- Ordered Structures and Statistical Properties of Ion Clouds in Paul Traps 45, 175 (1988).
- Quantum Jumps in a Single Ion Physica Scripta T22, 128 (1988).
- The kinetic energy of ion clouds in Paul traps Physica Scripta T22, 240 (1988).
- Cooling in traps Physica Scripta T22, 216 (1988).
1987
Proceedings
- Quantum Jumps and Related Phenomena of Single Ions and Small Ion Clouds Laser Spectroscopy VIII, 121 (1987).
- Quantum Jumps Observed in Single-Ion Fluorescence Fundamentals of Quantum Optics II,Lecture Notes in Physics 282 , 111 (1987).
- 'Quantum Jumps' Observed in the Fluorescence of a Single Ion AIP Optical Science and Engineering Series 6: Advances in Laser Science II , 337 (1987).
1986
Articles
- Atomic-beam cooling: A simulation approach Phys. Rev. A 34, 3022–3033 (1986).
- Brownian motion of a parametric oscillator: A model for ion confinement in radio frequency traps Zeitschrift für Physik D; Atoms, Molecules and Clusters 4, 121 - 126 (1986).
- Quantum Jumps Observed in the Fluorescence of a Single Ion 60, 287 (1986).
- Observation of Quantum Jumps Phys. Rev. Lett. 57, 1696 (1986).
- Ultrasensitive Detection of Light Absorption by Few Ions 59, 27 (1986).
Proceeding
- Cross Saturated Side-Band Absorption: The Limits of Detectivity Proceedings of the 1. ILS-Conference, Dallas 1985 in AIP Optical Science and Engineering Series 6: Advances in Laser Science I , (1986).
1985
Articles
- Laser Manipulation of Atomic Beam Velocities: Demonstration of Stopped Atoms and Velocity Reversal Phys. Rev. Lett. 54, 996 (1985).
- Atomic Beam Cooling by Counterpropagating Laser Radiation Acta Physica Austriaca 57, 151 (1985).
Proceeding
- "Laser Manipulation of Atomic Beam Velocities:Demonstration of Stopped Atoms and Velocity Reversal", Beitrag zum Seminar "Fundamentals of Laser Interactions", Obergurgl, Ötztal, Austria Lecture Notes in Physics 229, 309 , (1985).
1984
Articles
- Candidate Atoms and Ions for Frequency Standards Research Using Laser Radiative Cooling Techniques Progr. Quant. Electr. 8, 249 (1984).
- Cooling of an Atomic Beam with Frequency Sweep Techniques Progr. Quant. Electr. 8, 237 (1984).
- High Resolution Microwave Spectroscopy on Trapped Ba+ Ions PMFCII NBS Spec. Publ. 617, 99 (1984).
1983
Article
- Determination of the 171Yb+ Ground-State Hyperfine Separation Z. Phys. A 312, 143 (1983).
1982
Articles
- Ultrahigh Resolution Microwave Spectroscopy on Trapped 171Yb+ Ions Phys. Rev. Lett. 48, 1601 (1982).
- Precision Determination of the Ground-State Hyperfine Splitting in 137Ba+ Using the Ion Storage Technique Phys. Rev. A 25, 1476 (1982).
1981
Articles
- Precision Ground State Hfs Separation of 137Ba+ Zeitschrift für Physik A 299, 93 (1981).
- Precise Determination of 135Ba+ and 137Ba+ Hyperfine Structure Journ. de Physique Colloque C8 339, (1981).
1979
Article
- On The Sensitivity of Ion Traps for Spectroscopic Applications Appl. Phys. 20, 295 (1979).