Localized phase structures growing out of quantum fluctuations in a quench of tunnel-coupled atomic condensates

Abstract

We investigate the relative phase between two weakly interacting 1D condensates of bosonic atoms after suddenly switching on the tunnel-coupling. The following phase dynamics is governed by the quantum sine-Gordon equation. In the semiclassical limit of weak interactions, we observe the parametric amplification of quantum fluctuations leading to the formation of breathers with a finite lifetime. The typical lifetime and density of the these 'quasibreathers' are derived employing exact solutions of the classical sine-Gordon equation. Both depend on the initial relative phase between the condensates, which is considered as a tunable parameter.

7 pages, 5 figures

References in corpus (12)

• Non-equilibrium coherence dynamics in one-dimensional Bose gases
• Bosonizing one-dimensional cold atomic gases
• Oscillons After Inflation
• Linear response theory for a pair of coupled one-dimensional condensates of interacting atoms
• Quantum quench dynamics of the sine-Gordon model in some solvable limits
• Inflaton Fragmentation and Oscillon Formation in Three Dimensions
• Two-point phase correlations of a one-dimensional bosonic Josephson junction
• Decoherence Dynamics in Low-Dimensional Cold Atom Interferometers
• Emergence of Oscillons in an Expanding Background
• Weakly interacting Bose gas in the one-dimensional limit
• Adiabatic nonlinear probes of one-dimensional Bose gases
• Quenched dynamics in interacting one-dimensional systems: Appearance of current carrying steady states from initial domain wall density profiles

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