Quantum Phase Transitions and Continuous Observation of Spinor Dynamics in an Antiferromagnetic Condensate
Yingmei Liu, Sebastian Jung, Stephen E. Maxwell, Lincoln Turner, Eite Tiesinga, Paul D. Lett
Spinor Bose-Einstein condensates of F=1 sodium atoms display interesting spin population dynamics due to the antiferromagnetic nature of the interactions in this system. We use Faraday rotation spectroscopy, a minimally destructive technique, to continuously monitor the short-time dynamics and extract a sharp signature of a magnetically tuned transition which depends on net magnetization. In steady state we are also able to observe a sharp phase transition from a two- to a three-component condensate at low but finite temperature using a Stern-Gerlach method. This transition should be preserved as a zero-temperature quantum phase transition.
Physical Review Letters
antiferromagnetic spinor BEC, Faraday rotation spectroscopy, ground state phase transitions, magnetic tuned transition, spin population dynamics
, Jung, S.
, Maxwell, S.
, Turner, L.
, Tiesinga, E.
and Lett, P.
Quantum Phase Transitions and Continuous Observation of Spinor Dynamics in an Antiferromagnetic Condensate, Physical Review Letters
(Accessed December 7, 2021)