# Events (2015)

## 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 ...

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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 ...

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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 ...

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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. ...

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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 ...

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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 ...

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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. ...

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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 ...

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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 ...

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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 ...

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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 ...

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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 ...

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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.& ...

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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 ...

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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 ...

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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 ...

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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 ...

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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 ...

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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 ...

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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 ...

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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 ...

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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 ...

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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 ...

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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 ...

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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 ...

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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 ...

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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 ...

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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 ...

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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 ...

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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 ...

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