RySQ

Raman transitions between hyperfine clock states in a magnetic trap

Date: 
2016-07-27
Author(s): 

J. B. Naber, L. Torralbo-Campo, T. Hubert, and R. J. C. Spreeuw

Reference: 

Phys. Rev. A 94, 013427 (2016)

We present our experimental investigation of an optical Raman transition between the magnetic clock states of $^87$Rb in an atom chip magnetic trap. The transfer of atomic population is induced by a pair of diode lasers which couple the two clock states off-resonantly to an intermediate state manifold.

Electromagnetically induced transparency with Rydberg atoms across the Breit-Rabi regime

Date: 
2017-04-25
Author(s): 

J. B. Naber, A. Tauschinsky, van Linden van den Heuvell, and R. J. C. Spreeuw

Reference: 

SciPost Phys. 2, 015 (2017)

We present experimental results on the influence of magnetic fields and laser polarization on electromagnetically induced transparency (EIT) using Rydberg levels of $^87$Rb atoms. The measurements are performed in a room temperature vapor cell with two counter-propagating laser beams at 480nm and 780nm in a ladder-type energy level scheme.

Driven-dissipative many-body systems with mixed power-law interactions: Bistabilities and temperature-driven non-equilibrium phase transitions

Date: 
2015-12-07 - 2016-07-14
Author(s): 

Nikola Šibalić, Christopher G. Wade, Charles S. Adams, Kevin J. Weatherill, Thomas Pohl

Reference: 

PHYSICAL REVIEW A 94, 011401(R) (2016)

URL: 

arXiv:1512.02123v2

We investigate the non-equilibrium dynamics of a driven-dissipative spin ensemble with competing power-law interactions. We demonstrate that dynamical phase transitions as well as bistabilities can emerge for asymptotic van der Waals interactions, but critically rely on the presence of a slower decaying potential-core.

Nonlinear quantum optics mediated by Rydberg interactions

Date: 
2016-02-19
Author(s): 

Ofer Firstenberg, Charles S. Adams, Sebastian Hofferberth

Reference: 

arXiv:1602.06117v1

URL: 

arXiv:1602.06117v1

By mapping the strong interaction between Rydberg excitations in ultra-cold atomic ensembles onto single photons via electromagnetically induced transparency it is now possible to realize a nonlinear optical medium which can modify light on the level of individual photons.

Borromean three-body FRET in frozen Rydberg gases

Date: 
2015-09-08
Author(s): 

R. Faoro, B. Pelle, A. Zuliani, P. Cheinet, E. Arimondo and P. Pillet

Reference: 

Nature Communications 6, Article number: 8173
doi:10.1038/ncomms9173
Accepted : 25 July 2015, Published : 08 September 2015

Controlling the interactions between ultracold atoms is crucial for quantum simulation and computation purposes. Highly excited Rydberg atoms are considered in this prospect for their strong and controllable interactions known in the dipole-dipole case to induce non-radiative energy transfers between atom pairs, similarly to fluorescence resonance energy transfer (FRET) in biological systems. Here we predict few-body FRET processes in Rydberg atoms and observe the first three-body resonance energy transfer in cold Rydberg atoms using cold caesium atoms.

Non-equilibrium fluctuations and metastability in the dynamics of dissipative multi-component Rydberg gases

Date: 
2016-03-02
Author(s): 

Ricardo Gutierrez, Juan P. Garrahan, and Igor Lesanovsky

Reference: 

arXiv:1603.00828

Emergent kinetic constraints in open quantum systems

Date: 
2016-02-18
Author(s): 

B. Everest, M. Marcuzzi, J. P. Garrahan, and I. Lesanovsky

Reference: 

arXiv:1602.05839

On the non-equilibrium dynamics of dissipative Rydberg gases in the presence of dephasing noise

Date: 
2016-02-03
Author(s): 

Emanuele Levi, Ricardo Gutierrez, and Igor Lesanovsky

Reference: 

arXiv:1602.01314

Absorbing state phase transition with competing quantum and classical fluctuations

Date: 
2016-01-27
Author(s): 

M. Marcuzzi, M. Buchhold, S. Diehl, and I. Lesanovsky

Reference: 

Physical Review Letters 116, 245701 (2016)

Enhancement of Rydberg-mediated single-photon nonlinearities by electrically tuned Förster Resonances

Date: 
2016-02-01
Author(s): 

H. Gorniaczyk, C. Tresp, P. Bienias, A. Paris-Mandoki, W. Li, I. Mirgorodskiy, H. P. Büchler, I. Lesanovsky, and S. Hofferberth

Reference: 

arXiv:1511.09445

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