Hybrid Semiclassical Theory of Quantum Quenches in One-Dimensional Systems

Cǎtǎlin Paşcu Moca, Márton Kormos, G. Zaránd

Research output: Contribution to journalArticle

29 Citations (Scopus)


We develop a hybrid semiclassical method to study the time evolution of one-dimensional quantum systems in and out of equilibrium. Our method handles internal degrees of freedom completely quantum mechanically by a modified time-evolving block decimation method while treating orbital quasiparticle motion classically. We can follow dynamics up to time scales well beyond the reach of standard numerical methods to observe the crossover between preequilibrated and locally phase equilibrated states. As an application, we investigate the quench dynamics and phase fluctuations of a pair of tunnel-coupled one-dimensional Bose condensates. We demonstrate the emergence of soliton-collision-induced phase propagation, soliton-entropy production, and multistep thermalization. Our method can be applied to a wide range of gapped one-dimensional systems.

Original languageEnglish
Article number100603
JournalPhysical Review Letters
Issue number10
Publication statusPublished - Sep 8 2017

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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