RySQ

Quantum magnetism in optical lattices with enhanced Rydberg dressing

Date: 
2016-05-31
Author(s): 

R. M. W. van Bijnen

Conference/Workshop/Place: 
Workshop "Correlation and Order in Rydberg Gases", Lorentz Center, Netherlands
Format: 
Invited Talk

A Coherent Quantum Annealer with Rydberg Atoms

Date: 
2016-11-08
Author(s): 

A. W. Glaetzle, R. M. W. van Bijnen, P. Zoller, W. Lechner

Reference: 

Nat. Commun. 8, 15813 (2017)

There is a significant ongoing effort in realizing quantum annealing with different physical platforms. The challenge is to achieve a fully programmable quantum device featuring coherent adiabatic quantum dynamics. Here we show that combining the well-developed quantum simulation toolbox for Rydberg atoms with the recently proposed Lechner-Hauke-Zoller~(LHZ) architecture allows one to build a prototype for a coherent adiabatic quantum computer with all-to-all Ising interactions and, therefore, a novel platform for quantum annealing.

Optimal control of Rydberg lattice gases

Date: 
2017-02-23
Author(s): 

Jian Cui, Rick van Bijnen, Thomas Pohl, Simone Montangero, Tommaso Calarco

Reference: 

Quantum Sci. Technol. 2, 35006 (2017)

We present optimal control protocols to prepare different many-body quantum states of Rydberg atoms in optical lattices. Specifically, we show how to prepare highly ordered many-body ground states, GHZ states as well as some superposition of symmetric excitation number Fock states, that inherit the translational symmetry from the Hamiltonian, within sufficiently short excitation times minimizing detrimental decoherence effects.

Characterizing the local vectorial electric field near an atom chip using Rydberg-state spectroscopy

Date: 
2017-07-25
Author(s): 

N. Cisternas, Julius de Hond, G. Lochead, R.J.C. Spreeuw, H.B. van Linden van den Heuvell, N.J. van Druten

Reference: 

PHYSICAL REVIEW A 96, 013425 (2017)

We use the sensitive response to electric fields of Rydberg atoms to characterize all three vector components of the local electric field close to an atom-chip surface. We measured Stark-Zeeman maps of S and D Rydberg states using an elongated cloud of ultracold Rubidium atoms (T ~2.5 µK) trapped magnetically 100 µm from the chip surface. The spectroscopy of S states yields a calibration for the generated local electric field at the position of the atoms.

A medium-finesse optical cavity for the stabilization of Rydberg lasers

Date: 
2017-05-12
Author(s): 

JULIUS DE HOND, NATALY CISTERNAS, GRAHAM LOCHEAD, AND N.J. VAN DRUTEN

Reference: 

arxiv:1705.04684

QuSoft seminar, 5 Feb. 2016, Amsterdam

Talk by R.J.C. Spreeuw (UvA): Arrays of cold atom traps and prospects for quantum simulation

Workshop “Long range interactions in quantum systems”, 6-9 Sept. 2016, Ercolano, Italy

Talk by R.J.C. Spreeuw (UvA): Magnetic microtrap arrays, Rydberg atoms, and quantum simulation

SFB/TR49-Kolloquium, Institut für Physik, Johannes Gutenberg Universität, 30 April 2015, Mainz, Germany

Talk by R.J.C. Spreeuw (UvA): Lattices of magnetic microtraps, Rydberg atoms, and quantum simulation

RySQ meeting, Aarhus Institute Of Advanced Studies, Aarhus University, 11-13 March 2016, Aarhus, Denmark

Talk by R.J.C. Spreeuw (UvA): Rydberg atoms in lattices on atom chips

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