Vortex quantum creation and winding number scaling in a quenched spinor Bose gas

Abstract

Motivated by a recent experiment, we study non-equilibrium quantum phenomena taking place in the quench of a spinor Bose-Einstein condensate through the zero-temperature phase transition separating the polar paramagnetic and planar ferromagnetic phases. We derive the typical spin domain structure (correlations of the effective magnetization) created by the quench arising due to spin-mode quantum fluctuations, and establish a sample-size scaling law for the creation of spin vortices, which are topological defects in the transverse magnetization.

4+epsilon pages of RevTex4, 2 figures; to appear in Physical Review Letters

References in corpus (4)

• Spontaneous symmetry breaking in a quenched ferromagnetic spinor Bose condensate
• Quantum quenches in a spinor condensate
• Sweeping from the superfluid to Mott phase in the Bose-Hubbard model
• Topological defect formation in quenched ferromagnetic Bose-Einstein condensates

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