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Microscopic Characterization of Scalable Coherent Rydberg Superatoms

Tue, 2016-06-07 13:46 - Christian Gross
Date: 
2015-08-12 - 2016-06-07
Author(s): 

Johannes Zeiher, Peter Schauß, Sebastian Hild, Tommaso Macrì,
Immanuel Bloch, and Christian Gross

Reference: 

PHYSICAL REVIEW X 5, 031015 (2015)

URL: 

http://link.aps.org/doi/10.1103/PhysRevX.5.031015

Measuring the Chern number of Hofstadter bands with ultracold bosonic atoms

Tue, 2016-06-07 13:43 - Christian Gross
Date: 
2014-12-08 - 2016-06-07
Author(s): 

M. Aidelsburger, M. Lohse, C. Schweizer, M. Atala, J. T. Barreiro, S. Nascimbène,
N. R. Cooper, I. Bloch and N. Goldman

Reference: 

Nature Physics 11, 162 (2014)

URL: 

http://www.nature.com/nphys/journal/v11/n2/full/nphys3171.html

Frontiers of Quantum and Mesoscopic Thermodynamics (FQMT’15)

Fri, 2016-06-03 21:46 - Wolfgang Alt

Prague, 27.07. - 01.08.2015

Carsten Robens (UBONN) Talk: Quantum Walks with Neutral Atoms

https://fqmt.fzu.cz/15/

ICOLS 2015: The 22nd International Conference on Laser Spectroscopy

Fri, 2016-06-03 21:42 - Wolfgang Alt

Singapore, 28.06. - 03.07.2015

Andrea Alberti (UBONN) Talk: Quantum Walks with Neutral Atoms

http://icols2015.quantumlah.org/

Nanosystems Initiative Munich NIM Conference on Resonator QED

Fri, 2016-06-03 21:38 - Wolfgang Alt

Munich, 03.08. - 07.08.2015

Dieter Meschede (UBONN) Talk: Two Atoms Interacting with an Optical Cavity and Stable Optical Fiber Cavities

https://www.nano-initiative-munich.de/events/nim-conference-on-resonator...

602. WE-Heraeus-Seminar: Microwaves Go Quantum

Fri, 2016-06-03 21:34 - Wolfgang Alt

Bad Honnef, 17.11. - 20.11.2015

Andrea Alberti (UBONN) Talk: Control of atomic motion in state-dependent optical lattices

http://www.we-heraeus-stiftung.de/index.php?option=com_icagenda&view=lis...

DPG-Frühjahrstagung der Sektion Atome, Moleküle, Quantenoptik und Plasmen (SAMOP) 2016

Fri, 2016-06-03 21:30 - Wolfgang Alt

Hannover, 29.02. - 04.03.2016

Lothar Ratschbacher (UBONN) Talk: High finesse Fabry-Perot fiber resonators for efficient photonic interfacing: optimal mode-matching and stabilization

http://hannover16.dpg-tagungen.de/

SPIE Photonics Europe 2016: Quantum Technologies

Fri, 2016-06-03 21:22 - Wolfgang Alt

Brussels, 04.04.2016 - 07.04.2016

Lothar Ratschbacher (UBONN) Talk: High finesse optical fiber cavities - optimal alignment and robust stabilization

https://spie.org/conferences-and-exhibitions/photonics-europe

https://spie.org/EPE/conferencedetails/quantum-technologies

Robustness of topologically protected edge states in quantum walk experiments with neutral atoms

Fri, 2016-06-03 20:42 - Wolfgang Alt
Date: 
2016-05-11
Author(s): 

Thorsten Groh, Stefan Brakhane, Wolfgang Alt, Dieter Meschede, Janos Asbóth, Andrea Alberti

Reference: 

arXiv:1605.03633 [quant-ph]

URL: 

http://arxiv.org/abs/1605.03633

Discrete-time quantum walks allow Floquet topological insulator materials to be explored using controllable systems such as ultracold atoms in optical lattices. By numerical simulations, we study the robustness of topologically protected edge states in the presence of temporal disorder in one- and two-dimensional discrete-time quantum walks. We also develop a simple analytical model to gain further insight into the robustness of these edge states against either spin or spatial dephasing.

Super-resolution microscopy of single atoms in optical lattices

Fri, 2016-06-03 18:16 - Wolfgang Alt
Date: 
2016-05-06
Author(s): 

Andrea Alberti, Carsten Robens, Wolfgang Alt, Stefan Brakhane, Michał Karski, René Reimann, Artur Widera and Dieter Meschede

Reference: 

New J. Phys. 18, 053010 (2016)

URL: 

http://dx.doi.org/10.1088/1367-2630/18/5/053010

We report on image processing techniques and experimental procedures to determine the lattice-site positions of single atoms in an optical lattice with high reliability, even for limited acquisition time or optical resolution. Determining the positions of atoms beyond the diffraction limit relies on parametric deconvolution in close analogy to methods employed in super-resolution microscopy. We develop a deconvolution method that makes effective use of the prior knowledge of the optical transfer function, noise properties, and discreteness of the optical lattice.

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