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arXiv · 0908.2792

Dynamical quantum phase transition of a two-component Bose-Einstein condensate in an optical lattice

Anssi Collin·Jani-Petri Martikainen·Jonas Larson
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Abstract

We study dynamics of a two-component Bose-Einstein condensate where the two components are coupled via an optical lattice. In particular, we focus on the dynamics as one drives the system through a critical point of a first order phase transition characterized by a jump in the internal populations. Solving the time-dependent Gross-Pitaevskii equation, we analyze; breakdown of adiabaticity, impact of non-linear atom-atom scattering, and the role of a harmonic trapping potential. Our findings demonstrate that the phase transition is resilient to both contact interaction between atoms and external trapping confinement.

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Anssi Collin, Jani-Petri Martikainen, Jonas Larson. 2009-08-19. Dynamical quantum phase transition of a two-component Bose-Einstein condensate in an optical lattice. https://doi.org/10.1103/physreva.81.013603

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