Abstract
Versatile controllability of interactions and magnetic field in ultracold atomic gases ha now reached an era where spin mixing dynamics and spin-nematic squeezing can be studied. Recent experiments have realized spin-nematic squeezed vacuum and dynamic stabilization following a quench through a quantum phase transition. Here we propose a scheme for storage of maximal spin-nematic squeezing, with its squeezing angle maintained in a fixed direction, in a dipolar spin-1 condensate by applying a microwave pulse at a time that maximal squeezing occurs. The dynamic stabilization of the system is achieved by manipulating the external periodic microwave pulses. The stability diagram for the range of pulse periods and phase shifts that stabilize the dynamics is numerical simulated and agrees with a stability analysis. Moreover, the stability range coincides well with the spin-nematic vacuum squeezed region which indicates that the spin-nematic squeezed vacuum will never disappear as long as the spin dynamics are stabilized.
Highlights
The study of spin squeezing[1,2,3] has stimulated, both theoretically and experimentally, much recent interest because of their applications in quantum physics and quantum information processing[4,5]
The dynamics stabilization was performed in a spinor Bose-Einstein condensates (BECs) by manipulating the external periodic microwave pulses, by which the atoms are always condensed in one spin component[23]
We propose a scheme for storage of the maximal spin-nematic squeezing in a dipolar spinor condensate
Summary
The study of spin squeezing[1,2,3] has stimulated, both theoretically and experimentally, much recent interest because of their applications in quantum physics and quantum information processing[4,5]. The microwave pulse can be used to control the dynamics of spin-nematic squeezing. To generate the spin-nematic squeezed vacuum, we shall control the stability of the dynamics which ensure that there is essentially no population transfer (
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