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arXiv · 1102.4797

The ground state of the bose-hubbard model is a supersolid

Philip W Anderson
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Abstract

The Bose-Hubbard model is well-defined description of a Bose solid which may be realistic for cold atoms in a periodic optical lattice. We show that contrary to accepted theories it can never have as a ground state a perfect Mott insulator solid and that it has a low-energy spectrum of vortex-like phase fluctuations. Whether the ground state is necessarily commensurate remains an open question.

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Philip W Anderson. 2011-02-23. The ground state of the bose-hubbard model is a supersolid. https://arxiv.org/abs/1102.4797

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