title: Dynamic stabilization of a quantum many-body spin system.
abstract: We demonstrate dynamic stabilization of a strongly interacting quantum spin system realized in a spin-1 atomic Bose-Einstein condensate. The spinor Bose-Einstein condensate is initialized to an unstable fixed point of the spin-nematic phase space, where subsequent free evolution gives rise to squeezing and quantum spin mixing. To stabilize the system, periodic microwave pulses are applied that rotate the spin-nematic many-body fluctuations and limit their growth. The stability diagram for the range of pulse periods and phase shifts that stabilize the dynamics is measured and compares well with a stability analysis.
authors.affiliation: School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430, USA.
authors.forename: T M
authors.initials: TM
authors.lastname: Hoang
authors.forename: C S
authors.initials: CS
authors.lastname: Gerving
authors.forename: B J
authors.initials: BJ
authors.lastname: Land
authors.forename: M
authors.initials: M
authors.lastname: Anquez
authors.forename: C D
authors.initials: CD
authors.lastname: Hamley
authors.forename: M S
authors.initials: MS
authors.lastname: Chapman