Hannover 2020 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 21: Ultracold plasmas and Rydberg systems I (joint session Q/A)

A 21.4: Vortrag

Mittwoch, 11. März 2020, 14:45–15:00, f342

Strong spin-spin interactions and fast spin squeezing via Rydberg antiblockade dressing — •Weibin Li1, Huaizhi Wu1,2, and Shibiao Zheng21School of Physics and Astronomy, Unversity of Nottingham, Nottingham, UK — 2Fujian Key Laboratory of Quantum Information and Quantum Optics and Department of Physics, Fuzhou University, Fuzhou 350116, People's Republic of China

We propose an antiblockade Rydberg dressing (ARD) scheme with the atomic ground state optically dressed to two coupled Rydberg states. By tuning the laser frequency in proximity to the antiblockade resonance, we obtain an interaction potential where the Rydberg-dressed ground states experience weakly repulsive interactions at short distances, while undergo strongly attractive interaction at certain, larger distances. The dissipative dynamics of interacting atoms subjected to ARD can be effectively described by a dephasing process with both one-body and two-body losses. The ARD with significantly enhanced dressed interactions can be then applied for fast implementation of a spin-echo spin squeezing, and offers a new way for the study of complex collective dynamics and the simulation of many-body spin models.

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