Light cone dynamics and reverse Kibble-Zurek mechanism in two-dimensional superfluids following a quantum quench

Details Light cone dynamics and reverse Kibble-Zurek mechanism in two-dimensional superfluids following a quantum quench Light cone dynamics and reverse Kibble-Zurek mechanism in two-dimensional superfluids following a quantum quench

2009-12-31

arxiv.org/abs/1001.0098v1

Phys. Rev. A 81, 033605 (2010)

Physics

Condensed Matter

Quantum Gases

14 pages, 10 figures

Scientific paper

We study the dynamics of the relative phase of a bilayer of two-dimensional superfluids after the two superfluids have been decoupled. We find that on short time scales the relative phase shows "light cone" like dynamics and creates a metastable superfluid state, which can be supercritical. We also demonstrate similar light cone dynamics for the transverse field Ising model. On longer time scales the supercritical state relaxes to a disordered state due to dynamical vortex unbinding. This scenario of dynamically suppressed vortex proliferation constitutes a reverse-Kibble-Zurek effect. We study this effect both numerically using truncated Wigner approximation and analytically within a newly suggested time dependent renormalization group approach (RG). In particular, within RG we show that there are two possible fixed points for the real time evolution corresponding to the superfluid and normal steady states. So depending on the initial conditions and the microscopic parameters of the Hamiltonian the system undergoes a non-equilibrium phase transition of the Kosterlitz-Thouless type. The time scales for the vortex unbinding near the critical point are exponentially divergent, similar to the equilibrium case.

Affiliated with

Also associated with

No associations

Rating

Light cone dynamics and reverse Kibble-Zurek mechanism in two-dimensional superfluids following a quantum quench does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Light cone dynamics and reverse Kibble-Zurek mechanism in two-dimensional superfluids following a quantum quench, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light cone dynamics and reverse Kibble-Zurek mechanism in two-dimensional superfluids following a quantum quench will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-104387