Dynamical generation of spin squeezing in ultra-cold dipolar molecules

Event Dates: 

Wednesday, December 2, 2020 - 12:00pm

CTQM Seminar Type: 

  • CTQM Discussion

Seminar Location: 

  • Other

Seminar Location Other: 


Speaker Name(s): 

Thomas Bilitewski

Speaker Affiliation(s): 

CU Boulder & JILA

Abstract, Event Details: 

We study a bulk fermionic dipolar molecular gas in the quantum degenerate regime confined in a two-dimensional geometry, where two rotational states encode a spin 1/2 degree of freedom. We derive a long-range interacting XXZ model describing the many-body spin dynamics of the molecules valid in the regime where motional degrees of freedom are frozen. Due to 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 presence of dephasing and chemical reactions. We demonstrate how the internal state structure can be exploited to realise time-reversal and enhanced metrological sensing protocols.

Research Category: