A supercritical superfluid and vortex unbinding following a quantum quench

Abstract

We study the dynamics of the relative phase of a bilayer of two-dimensional superfluids after the two superfluids have been decoupled, using truncated Wigner approximation. On short time scales the relative phase shows "light cone" like thermalization and creates a metastable superfluid state, which can be supercritical. On longer time scales this state relaxes to a disordered state due to dynamical vortex unbinding. This scenario of dynamically suppressed vortex proliferation constitutes a {\it reverse-Kibble-Zurek effect}. We observe dynamics of creation of vortex anti-vortex pairs and their consequent motion. Our predictions can be directly measured in interference experiments, see Ref 1.

4 pages, 5 figures

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Cited by in corpus (16)

• Phase space representation of quantum dynamics
• Quantum Quench of an Atomic Mott Insulator
• Critical Dynamics of a Two-dimensional Superfluid near a Non-Thermal Fixed Point
• Light cone dynamics and reverse Kibble-Zurek mechanism in two-dimensional superfluids following a quantum quench
• Correlation functions in the prethermalized regime after a quantum quench of a spin-chain
• Thermalization and dissipation in out of equilibrium quantum systems: A perturbative renormalization group approach
• Vortex pairing in two-dimensional Bose gases
• Decay of a superfluid current of ultra-cold atoms in a toroidal trap
• Time-evolution and dynamical phase transitions at a critical time in a system of one dimensional bosons after a quantum quench
• Semiclassical quench dynamics of Bose gases in optical lattices
• Dynamic Kosterlitz-Thouless transition in 2D Bose mixtures of ultra-cold atoms
• Interaction-driven dynamical quantum phase transitions in a strongly correlated bosonic system
• Destruction of Long-range Order by Quenching the Hopping Range in One Dimension
• Squeezed field path integral description of second sound in Bose-Einstein condensates
• Correlations generated from high-temperature states: nonequilibrium dynamics in the Fermi-Hubbard model
• Quantum-field-theoretical approach to phase-space techniques: Symmetric Wick theorem and multitime Wigner representation