# Events (2015)

## Seminar

Formation and dynamics of anti-ferromagnetic correlations of ultracold fermions in tunable lattices**Speaker:**Rémi Desbuquois

**When:**November 26, 2015 09:00

**Where:**Erwin Schrödinger Saal

The observation of anti-ferromagnetic spin correlations of ultracold fermions in optical lattices is an important milestone towards an experimental study of the Hubbard model. In this model many quest ...

Read more## Seminar

Observing Pauli's principle with a Fermi gas microscope**Speaker:**Ahmed Omran

**When:**November 25, 2015 17:15

**Where:**lecture hall C

The ability of single-atom resolved detection in optical lattice experiments had huge impact on the study of strongly correlated bosonic quantum gases. In our experiment we have recently achieved the ...

Read more## Seminar

Dissipative preparation of entangled steady states**Speaker:**Florentin Reiter

**When:**November 13, 2015 10:00

**Where:**Erwin Schrödinger Saal

Quantum information processing is to a large extent performed using unitary gate operations which are affected by decoherence and dissipation. This imposes limitations on possible quantum information ...

Read more## Physics Colloquium

From the Einstein-Bohr debate to entangled qubits: a new quantum revolution**Speaker:**Alain Aspect

**When:**November 10, 2015 17:15

**Where:**Lecture Hall A

In 1935, with co-authors Podolsky and Rosen, Einstein discovered a weird quantum situation, in which particles in a pair are so strongly correlated that Schrödinger called them “entangled”. By an ...

Read more## Seminar

Polar gases in layered structures**Speaker:**Azadeh Mazloom Shahraki

**When:**November 02, 2015 11:00

**Where:**Erwin Schrödinger Saal

Tuning of anisotropic and long-range interaction between particles in polar and magnetic ultracold gases via an external field makes it possible to realize exotic phases beyond what is possible for sy ...

Read more## Seminar

Stealth for Atoms: Precision measurement in ultracold metastable helium atoms to test QED**Speaker:**Kenneth Baldwin

**When:**October 30, 2015 14:15

**Where:**IQOQI lecture hall

Helium is a favoured test bed for validating quantum electrodynamic theory through precision spectroscopic measurements. We have previously measured transition rates in ultracold metastable helium a ...

Read more## Seminar

Macroscopic Optomechanical Superpositions via Periodic Qubit Flipping**Speaker:**Wenchao Ge

**When:**October 12, 2015 15:00

**Where:**Erwin Schrödinger Saal

In this talk, we will discuss a scheme to generate macroscopic superpositions of well-distinguishable coherent states of an end mirror in an optomechanical system via periodic qubit flipping. Our sche ...

Read more## Seminar

Quantum information processing with atoms coupled to waveguides and cavitie**Speaker:**Anders Sorensen

**When:**October 01, 2015 14:00

**Where:**Erwin Schrödinger Saal

I will discuss different ways in which one can exploit the coupling of atoms (or other light emitters) to optical waveguides or cavities for quantum information processing. At first sight the direct ...

Read more## Seminar

Make ions count - a quantum simulation approach to computational problems**Speaker:**Tobias Grass

**When:**September 29, 2015 11:00

**Where:**Erwin Schrödinger Saal

Trapped ions provide flexible emulators of spin Hamiltonians. In this talk, I will motivate to use ions for an implementation of a Mattis-type spin glass model, or of a Hopfield-like neural network mo ...

Read more## Seminar

Investigation of the Raman model of quantum memory for light**Speaker:**Viacheslav Kuzmin

**When:**September 25, 2015 14:30

**Where:**Erwin Schrödinger Saal

## Seminar

Mode analysis in Lambda – type quantum memory problem**Speaker:**Natalia Masalaeva

**When:**September 25, 2015 14:00

**Where:**Erwin Schrödinger Saal

## Talk

Quantum magnetism with Rydberg-dressed ground state atoms**Speaker:**R Van Bijnen

**When:**September 25, 2015 11:00

**Where:**Erwin Schrödinger Saal

Atoms excited to Rydberg states with high principal quantum numbers n = 20 .. 100 acquire some extreme properties, such as the van der Waals interactions whose strength scales with a formidable n^11. ...

Read more## Seminar

Study of the conductive interfaces between Al2O3 and SrTiO3**Speaker:**Nicola Maraviglia

**When:**September 25, 2015 09:15

**Where:**Erwin Schrödinger Saal

## Seminar

Rabi oscillations with atomic cavities**Speaker:**Pierre-Olivier Guimond

**When:**September 18, 2015 10:00

**Where:**Erwin Schrödinger Saal

I study the Rabi oscillations of an atom located inside a quantum cavity where each mirror consists of an array of atoms coupled to a one-dimensional waveguide. This proposal was previously studied wi ...

Read more## Seminar

High-Tc Superconductive Bolometric & JJ based detectors and SQUIDs**Speaker:**Mehdi Fardmanesh

**When:**September 03, 2015 10:00

**Where:**Erwin Schrödinger Saal

In this presentation, after a short review of the principal operation and advantages of high temperature superconductive ultra wide band bolometric and Josephson Junction based detectors, and ...

Read more## Seminar

A microscopic model for optomechanics**Speaker:**Kanupriya Sinha

**When:**August 31, 2015 14:00

**Where:**Erwin Schrödinger Saal.

We discuss a microscopic model for describing optomechanical interactions, which incorporates the dynamics of the charge-like internal degrees of freedom of a mirror that couple to the optical field. ...

Read more## Seminar

Oxford-led Hub for Networked Quantum Information Technology**Speaker:**Simon Benjamin

**When:**August 18, 2015 10:00

**Where:**Erwin Schrödinger Saal

## Seminar

Manipulating ultracold atoms in finite size and time dependent potentials**Speaker:**Gabriel Condon

**When:**July 30, 2015 09:15

**Where:**Erwin Schrödinger Saal

## Seminar

Simulating coupled spin systems in "imaginary time" with lasers**Speaker:**Nir Davidson

**When:**July 23, 2015 11:00

**Where:**Erwin Schrödinger Saal

We first present very large arrays of >1000 lasers with dissipative coupling that generate minimal-loss steady states with phase ordering identical to the ground state of the corresponding (classi ...

Read more## Invited Talk

On the peculiar nature of light-matter fluids**Speaker:**Ehud Altman

**When:**July 10, 2015 09:30

**Where:**lecture hall C

## Invited Talk

Physics of few-body bound states and collisions**Speaker:**Chris Greene

**When:**July 09, 2015 15:30

**Where:**Lecture Hall A

## Seminar

A new, unconventional picture of fractional quantum Hall physics**Speaker:**Chris Greene

**When:**July 08, 2015 15:00

**Where:**Erwin Schrödinger Saal

## Seminar

Magnetic crystals and helical liquids in alkaline-earth fermionic gases**Speaker:**Simone Barbarino

**When:**July 08, 2015 11:00

**Where:**Erwin Schrödinger Saal

## Seminar

Adiabatic control for efficient single photon absorption in free space and for quantum gates in optical lattices**Speaker:**Nils Trautmann

**When:**July 01, 2015 11:00

**Where:**Erwin Schrödinger Saal

A technique is presented for achieving deterministic generation and absorption of single photon wave packets by single atoms in free space. It exploits basic features of st ...

Read more## Seminar

Predicting the Future of Noisy Qubits**Speaker:**Michael Biercuk

**When:**June 19, 2015 09:15

**Where:**IQOQI lecture hall

The uncontrolled evolution of qubits in the presence of a noisy environment poses a major challenge to the development of quantum information systems. Nonetheless, similar circumstances are common in ...

Read more## Seminar

Loss Tolerance in Topological Quantum Error Correcting Codes**Speaker:**Tom Stace

**When:**June 18, 2015 15:00

**Where:**IQOQI lecture hall

Quantum error correction is one of the keys to building a quantum computer, and has profound implications for quantum physics. I will review topological quantum error correcting codes, which were insp ...

Read more## Seminar

Laser cooling without spontaneous emission**Speaker:**Harold Metcalf

**When:**June 18, 2015 14:01

**Where:**IQOQI lecture hall

The notion of laser cooling in the absence of spontaneous emission has generated considerable controversy because of entropy transport concerns. However, energy conservation is an even moresignifican ...

Read more## Seminar

Probing Ultracold Atoms using Faraday Interfaces: new applications in Thermometry and the Measurement of Atomic Probability Distribution Functions**Speaker:**Maria Moreno-Cardoner

**When:**June 18, 2015 11:00

**Where:**Erwin Schrödinger Saal.

In this talk, I will present two new applications of the Faraday spectroscopy to characterize quantum many-body states. In the first part, I will discuss how useful this scheme can be to perform therm ...

Read more## Seminar

Coupled Nonlinear Resonators for Josephson Parametric Amplification**Speaker:**Antonio Rubio Abadal

**When:**June 08, 2015 09:15

**Where:**Erwin Schrödinger Saal

## Seminar

Ultracold Fermions for Quantum Simulation & Precision Measurements**Speaker:**Sebastian Blatt

**When:**May 22, 2015 10:30

**Where:**Erwin Schrödinger Saal

In the last decade studies of ultracold atoms in optical traps have advanced to the point where both bosonic and fermionic atoms are now available in optical lattices with single-site addressability.& ...

Read more## Talk

Extending the quantum domain with quantum optics**Speaker:**C Simon

**When:**May 15, 2015 10:00

**Where:**Erwin Schrödinger Saal

## Seminar

Quantum Optics without photons --- from basic effects to new quantum information architectures.**Speaker:**Martin Schütz

**When:**May 06, 2015 15:00

**Where:**Erwin Schrödinger Saal

Traditionally, Quantum Optics is a field of research investigating light, matter and its interactions. In this talk, I will discuss several instances were methods and ideas from Quantum Optics find no ...

Read more## Seminar

Towards Quantum Simulation with magnetic lattices**Speaker:**Arthur La Rooij

**When:**April 30, 2015 13:30

**Where:**Erwin Schrödinger Saal

We use nano-lithography techniques to create lattice potentials in permanent magnetic films at atom chips. These lattices can be created over a large range of length scales and are used to trap mesosc ...

Read more## Seminar

Frequency stabilization of diode lasers using a narrow bandwidth optical resonator and possible applications for ultracold atoms experiments**Speaker:**Chi Zhang

**When:**April 30, 2015 09:00

**Where:**Erwin Schrödinger Saal

This thesis describes the frequency stabilization of external-cavity diode lasers with a high-finesse optical cavity by the Pound Drever Hall technique, as well as the potential applications of optica ...

Read more## Seminar

Atom-electron interaction in ultracold gas: from few to many body physics**Speaker:**Anita Gaj

**When:**April 29, 2015 17:15

**Where:**lecture hall C

In Rydberg atoms the valance electron is excited to a very high principal quantum number. The interaction between a slow Rydberg electron and a ground state atom can be described by a Fermi pseudopote ...

Read more## Seminar

High performance Quantum Computing**Speaker:**Matthias Troyer

**When:**April 29, 2015 14:01

**Where:**Erwin Schrödinger Saal

## Seminar

Long-time atom interferometry for tests of fundamental physics**Speaker:**Susannah Dickerson

**When:**April 22, 2015 17:15

**Where:**lecture hall C

Light-pulse atom interferometry is a technique that is exquisitely sensitive to inertial forces. As such, it has exciting applications both in fundamental physics for precision tests of gravity, elect ...

Read more## Physics Colloquium

Topological Phases of Sound and Light**Speaker:**Florian Marquardt

**When:**April 21, 2015 17:15

**Where:**lecture hall C

## Talk

Towards a MOT for CaF and prospects of laser cooling SrOH**Speaker:**Börge Hemmerling

**When:**April 21, 2015 09:15

**Where:**Erwin Schrödinger Saal

## Seminar

Decoherence and absorption spectra of impurities in ultracold quantum gases**Speaker:**Richard Schmidt

**When:**April 16, 2015 09:00

**Where:**Erwin Schrödinger Saal

## Seminar

Magnetic crystals and helical liquids in multi-component Fermi gases**Speaker:**Luca Taddia

**When:**April 14, 2015 10:30

**Where:**Erwin Schrödinger Saal

Abstract: The joint action of particle-particle interactions and gauge fields is well known to give rise to exotic quantum phases of matter, whose most famous example is fractional quantum Hall effect ...

Read more## Talk

Quantum cavity electro-mechanics with ultra-high impedance microwave circuits**Speaker:**Johannes Fink

**When:**March 23, 2015 17:00

**Where:**Erwin-Schödinger-Saal, IQOQI

Superconducting circuits are at the focus of quantum engineering research because of their potential for scalable quantum information processing and simulation. One disadvantage of circuit QED systems ...

Read more## Seminar

Matter-wave interferometry close to the surface of an atom-chip**Speaker:**Ron Folman

**When:**March 05, 2015 09:00

**Where:**Erwin Schrödinger Saal

Matter-wave interferometry on atom-chips has been around for a decade. Several groups around the world are now operating such devices based on different methods for splitting such as light, RF, and MW ...

Read more## Seminar

Commensurability and friction in an ion-cavity system**Speaker:**Thomas Fogarty

**When:**March 03, 2015 15:00

**Where:**IQOQI lecture hall

I describe the process of self-organisation of ions in an optical cavity due to the interplay between the Coulomb forces of the ions and the optical forces from the cavity. This can be described in th ...

Read more## Seminar

Application for PhD position**Speaker:**Maciej Malinowski

**When:**March 03, 2015 10:00

**Where:**University seminar room east, 4th floor

## Talk

How do you measure a Fermionic Quantum Field as a Theorist? -- Unruh-DeWitt-type Particle Detector Models for Scalar and Spinor Fields**Speaker:**Daniel Hümmer

**When:**February 03, 2015 15:00

**Where:**Erwin Schrödinger Saal.

In theoretical physics, there is multitude of different mathematical methods how to explore the properties of a quantum field. Among these, particle detector models have become a pop ...

Read more## Talk

What does it mean for half of an empty box to be full?**Speaker:**Eric Brown

**When:**February 02, 2015 15:00

**Where:**Erwin Schrödinger Saal.

It is well known that the vacuum state of a quantum field is spatially entangled. This is true both in free and confined spaces, for example in an optical cavity. The obvious consequence of this, howe ...

Read more## Seminar

Magnetism with spinor Bose-Einstein condensates with antiferromangetic interactions**Speaker:**

**When:**January 29, 2015 09:00

**Where:**Erwin Schrödinger Saal

We experimentally study the magnetic properties of spin-1 Bose-Einstein condensate of Sodium at equilibrium. In this system the atoms can occupy any of the three Zeeman states. We measure the spin sta ...

Read more## Talk

Back-action driven transport of Bloch oscillating atoms in ring cavities**Speaker:**B. Prasanna Venkatesh

**When:**January 27, 2015 14:00

**Where:**Erwin Schrödinger Saal.

Transport under uniform bias in normal metallic systems requires dephasing of Bloch oscillations due to presence of impurities. In contrast, for atoms in optical lattices (with an external applied un ...

Read more## Seminar

How to manipulate neuronal function in a mouse brain, without wires**Speaker:**Hans Bachor

**When:**January 22, 2015 15:00

**Where:**IQOQI lecture hall

Light is now an indispensable tool among neuroscientists, particularly for the visualisation and characterisation of cells and proteins and for functional imaging. Coherent laser technology with spect ...

Read more## Seminar

Outlook for the Quantum Computation of Quantum Chemistry**Speaker:**Ryan Babbush

**When:**January 15, 2015 15:00

**Where:**Erwin Schrödinger Saal

The central problem of quantum chemistry is to solve for the energy of electrons interacting in the nuclear potential of a molecule. While widely believed to be classically intractable, quantum comput ...

Read more## Lecture

Gravitational quantum physics**Speaker:**Časlav Brukner

**When:**January 09, 2015 10:00

**Where:**Erwin Schrödinger Saal

Quantum physics differs from classical physics in that no definite values can be attributed to observables independently of the measurement context. However, the notion of time and of causal order pre ...

Read more## Lecture

Gravitational quantum physics**Speaker:**Časlav Brukner

**When:**January 08, 2015 10:00

**Where:**

Quantum physics differs from classical physics in that no definite values can be attributed to observables independently of the measurement context. However, the notion of time and of causal order pre ...

Read more## Lecture

Gravitational quantum physics**Speaker:**Časlav Brukner

**When:**January 07, 2015 13:00

**Where:**Erwin Schrödinger Saal

Quantum physics differs from classical physics in that no definite values can be attributed to observables independently of the measurement context. However, the notion of time and of causal order pre ...

Read more