Dynamical Generation of Spin Squeezing in Ultracold Dipolar Molecules.

Published on Mar 17, 2021in arXiv: Quantum Physics
· DOI :10.1103/PHYSREVLETT.126.113401
Thomas Bilitewski8
Estimated H-index: 8
,
Luigi De Marco14
Estimated H-index: 14
+ 5 AuthorsAna Maria Rey62
Estimated H-index: 62
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Abstract
We study a bulk fermionic dipolar molecular gas in the quantum degenerate regime confined in a two-dimensional geometry. Using two rotational states of the molecules, we encode a spin 1/2 degree of freedom. To describe the many-body spin dynamics of the molecules, we derive a long-range interacting XXZ model valid in the regime where motional degrees of freedom are frozen. Because of the spatially extended nature of the harmonic oscillator modes, the interactions in the spin model are very long ranged, and the system behaves close to the collective limit, resulting in robust dynamics and generation of entanglement in the form of spin squeezing even at finite temperature and in the presence of dephasing and chemical reactions. We discuss how the internal state structure can be exploited to realize time reversal and enhanced metrological sensing protocols.
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#1Jun-Ru Li (NIST: National Institute of Standards and Technology)H-Index: 8
#2William G. Tobias (NIST: National Institute of Standards and Technology)H-Index: 3
Last. John L. Bohn (NIST: National Institute of Standards and Technology)H-Index: 63
view all 11 authors...
Ultracold polar molecules possess long-range, anisotropic and tunable dipolar interactions, providing opportunities to probe quantum phenomena that are inaccessible with existing cold gas platforms. However, experimental progress has been hindered by the dominance of two-body loss over elastic interactions, which prevents efficient evaporative cooling. Although recent work has demonstrated controlled interactions by confining molecules to a two-dimensional geometry, a general approach for tuning...
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#1Jun-Ru LiH-Index: 8
#2William G. TobiasH-Index: 3
Last. Jun YeH-Index: 126
view all 11 authors...
Ultracold polar molecules possess long-range, anisotropic, and tunable dipolar interactions, providing unique opportunities to probe novel quantum phenomena. However, experimental progress has been hindered by excessive two-body loss, which also limits further cooling via evaporation. Recent work shows the loss can be mitigated by confining molecules in a two-dimensional geometry. However, a general approach for tuning molecular interactions in a full three-dimensional (3D) stable system has bee...
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