Dynamical generation of spin squeezing in ultra-cold dipolar molecules
Date
2020-11-16Author
Bilitewski, Thomas
Marco, Luigi De
Li, Jun-Ru
Matsuda, Kyle
Tobias, William G.
Valtolina, Giacomo
Ye, Jun
Rey, Ana Maria
Metadata
Show full item recordAbstract
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 longrange interacting XXZ model 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 discuss how the internal state structure can be exploited to realise time-reversal and enhanced metrological sensing protocols.
Citation
Bilitewski, T., Marco, L.D., Li, J.-R., Matsuda, K., Tobias, W.G., Valtolina, G., Ye, J., Rey, A.M. (2020). Dynamical generation of spin squeezing in ultra-cold dipolar molecules.