2012

A continuous transition between fractional quantum Hall and superfluid states

Barkeshli, Maissam, McGreevy, John

Understand

We develop a theory of a direct, continuous quantum phase transition between a bosonic Laughlin fractional quantum Hall (FQH) state and a superfluid, generalizing the Mott insulator to superfluid phase diagram of bosons to allow for the breaking of time-reversal symmetry.

The direct transition can be protected by a spatial symmetry, and the critical theory is a pair of Dirac fermion fields coupled to an emergent Chern-Simons gauge field.
The transition may be achieved in optical traps of ultracold atoms by starting with a $\nu = 1/2$ bosonic Laughlin state and tuning an appropriate periodic potential to change the topology of the composite fermion band structure.

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A. Vaezi (2011), eprint arXiv:1105.0406; J. McGreevy, B. Swingle, and K.-A. Tran (2011), eprint arXiv:1109.1569; Y.-M. Lu and Y. Ran (2011), eprint arXiv:1109.0226
Original
2011
Later among the works it cites.

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