Migration of Bosonic Particles across a Mott Insulator to a Superfluid Phase Interface
- Institute for Mathematical Sciences, Imperial College London, SW7 2PG (United Kingdom)
We consider a boundary between a Mott insulator and a superfluid region of a Bose-Hubbard model at unit filling. Initially both regions are decoupled and cooled to their respective ground states. We show that, after switching on a small tunneling rate between both regions, all particles of the Mott region migrate to the superfluid area. This migration takes place whenever the difference between the chemical potentials of both regions is less than the maximal energy of any eigenmode of the superfluid. We verify our results numerically with density matrix renormalization group simulations and explain them analytically with a master equation approximation, finding good agreement between both approaches. Finally we carry out a feasibility study for the observation of the effect in coupled arrays of microcavities and optical lattices.
- OSTI ID:
- 21024780
- Journal Information:
- Physical Review Letters, Vol. 100, Issue 7; Other Information: DOI: 10.1103/PhysRevLett.100.070602; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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