Domain-wall dynamics in a two-component Bose-Mott insulator

Stefan S. Natu and Erich J. Mueller
Phys. Rev. A 82, 013612 – Published 12 July 2010

Abstract

We model the dynamics of two species of bosonic atoms trapped in an optical lattice within the Mott regime by mapping the system onto a spin model. A field gradient breaks the cloud into two domains. We study how the domain wall evolves under adiabatic and diabatic changes of this gradient. We determine the time scales for adiabaticity and study how temperature evolves for slow ramps. We show that after large, sudden changes of the field gradient, the system does not equilibrate on typical experimental time scales. We find interesting spin dynamics even when the initial temperature is large compared to the superexchange energy. We discuss the implication of our results for researchers wishing to use such a two-component system for thermometry or as part of a cooling scheme.

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  • Received 15 May 2010

DOI:https://doi.org/10.1103/PhysRevA.82.013612

©2010 American Physical Society

Authors & Affiliations

Stefan S. Natu* and Erich J. Mueller

  • Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA

  • *ssn8@cornell.edu
  • em256@cornell.edu

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Issue

Vol. 82, Iss. 1 — July 2010

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