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Crystalline structures in a one-dimensional two-component lattice gas with 1/r^α interactions

Fri, 2016-03-11 15:22 - Ricardo gutierrez
Date: 
2015-10-19
Author(s): 

Emanuele Levi, Jiří Minář, and Igor Lesanovsky

Reference: 

Journal of Statistical Mechanics, P033111 (2016)

URL: 

http://arxiv.org/abs/1503.03268

Atomic loss and gain as a resource for non-equilibrium phase transitions in optical lattices

Fri, 2016-03-11 15:14 - Ricardo gutierrez
Date: 
2016-02-09
Author(s): 

B. Everest, M. Marcuzzi and I. Lesanovsky

Reference: 

Physical Review A 93, 023409 (2016)

URL: 

http://journals.aps.org/pra/abstract/10.1103/PhysRevA.93.023409

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

Fri, 2016-03-11 11:57 - Hans Peter Büchler
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: 

Nature Communications 7, 12480 (2016)

URL: 

https://www.nature.com/articles/ncomms12480

Precision measurement of the ionization energy of Cs I

Fri, 2016-03-11 11:14 - Johannes Deiglmayr
Date: 
2016-03-11
Author(s): 

Johannes Deiglmayr, Holger Herburger, Heiner Saßmannshausen, Paul Jansen, Hansjürg Schmutz, and Frédéric Merkt

Reference: 

Phys. Rev. A 93, 013424 (2016)

URL: 

http://journals.aps.org/pra/abstract/10.1103/PhysRevA.93.013424

We present absolute-frequency measurements for the transitions from the 6s1/2 ground state of 133Cs to np1/2 and np3/2 Rydberg states. The transition frequencies are determined by one-photon UV spectroscopy in ultracold samples of Cs atoms using a narrowband laser system referenced to a frequency comb.

Adsorbate dynamics on a silica-coated gold surface measured by Rydberg Stark spectroscopy

Thu, 2016-03-10 16:47 - shimon machluf
Date: 
2016-04-18
Author(s): 

J. Naber, S. Machluf, L. Torralbo-Campo, M. L. Soudijn, N. J. van Druten, H. B. van Linden van den Heuvell, and R. J. C. Spreeuw

Reference: 

Journal of Physics B: Atomic, Molecular and Optical Physics, Volume 49, Number 9

URL: 

http://stacks.iop.org/0953-4075/49/i=9/a=094005

Quantum Crystals and Laughlin Droplets of Cavity Rydberg Polaritons

Wed, 2016-03-09 15:00 - Hans Peter Büchler
Date: 
2015-06-02
Author(s): 

Ariel Sommer, Hans Peter Büchler, and Jonathan Simon

Reference: 

arxiv:1506.00341

URL: 

http://arxiv.org/abs/1506.00341

Synthetic quantum materials offer an exciting opportunity to explore quantum many-body physics and novel states of matter under controlled conditions. In particular, they provide an avenue to exchange the short length scales and large energy scales of the solid state for an engineered system with better control over the system Hamiltonian, more accurate state preparation, and higher fidelity state readout.

Rydberg-induced optical nonlinearities from a cold atomic ensemble trapped inside a cavity

Wed, 2016-03-09 10:40 - Marc Cheneau
Date: 
2015-12-28
Author(s): 

Rajiv Boddeda, Imam Usmani, Erwan Bimbard, Andrey Grankin, Alexei Ourjoumtsev, Etienne Brion, and Philippe Grangier

Reference: 

arXiv:1512.08480 [quant-ph], to appear in J. Phys. B special issue on Rydberg atoms

URL: 

http://arxiv.org/abs/1512.08480

We experimentally characterize the optical nonlinear response of a cold atomic medium placed inside an optical cavity, and excited to Rydberg states. The excitation to S and D Rydberg levels is carried out via a two-photon transition in an EIT (electromagnetically induced transparency) configuration, with a weak (red) probe beam on the lower transition, and a strong (blue) coupling beam on the upper transition. The observed optical nonlinearities induced by S states for the probe beam can be explained using a semi-classical model with van der Waals' interactions.

Measurement of the angular dependence of the dipole-dipole interaction between two individual Rydberg atoms at a Förster resonance

Wed, 2016-03-09 10:31 - Marc Cheneau
Date: 
2015-08-25
Author(s): 

Sylvain Ravets, Henning Labuhn, Daniel Barredo, Thierry Lahaye, and Antoine Browaeys

Reference: 

Phys. Rev. A 92, 020701(R)

URL: 

http://dx.doi.org/10.1103/PhysRevA.92.020701

We measure the angular dependence of the resonant dipole-dipole interaction between two individual Rydberg atoms with controlled relative positions. By applying a combination of static electric and magnetic fields on the atoms, we demonstrate the possibility to isolate a single interaction channel at a Förster resonance, that shows a well-defined angular dependence.

Correlated Exciton Transport in Rydberg-Dressed-Atom Spin Chains

Mon, 2016-03-07 12:20 - Shannon Whitlock
Date: 
2016-03-07
Author(s): 

H. Schempp, G. Günter, S. Wüster, M. Weidemüller and S. Whitlock

Reference: 

Phys. Rev. Lett. 115, 093002 (2015)

URL: 

http://link.aps.org/doi/10.1103/PhysRevLett.115.093002

We investigate the transport of excitations through a chain of atoms with nonlocal dissipation introduced through coupling to additional short-lived states. The system is described by an effective spin-1/2 model where the ratio of the exchange interaction strength to the reservoir coupling strength determines the type of transport, including coherent exciton motion, incoherent hopping, and a regime in which an emergent length scale leads to a preferred hopping distance far beyond nearest neighbors.

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