Realistic Time-Reversal Invariant Topological Insulators With Neutral Atoms

Details Realistic Time-Reversal Invariant Topological Insulators With Neutral Atoms Realistic Time-Reversal Invariant Topological Insulators With Neutral Atoms

2010-11-17

arxiv.org/abs/1011.3909v1

Phys. Rev. Lett.105 255302 (2010)

Physics

Condensed Matter

Quantum Gases

4 pages, 4 figures, Accepted in Phys. Rev. Lett. (Nov 2010)

Scientific paper

10.1103/PhysRevLett.105.255302

We lay out an experiment to realize time-reversal invariant topological insulators in alkali atomic gases. We introduce an original method to synthesize a gauge field in the near-field of an atom-chip, which effectively mimics the effects of spin-orbit coupling and produces quantum spin-Hall states. We also propose a feasible scheme to engineer sharp boundaries where the hallmark edge states are localized. Our multi-band system has a large parameter space exhibiting a variety of quantum phase transitions between topological and normal insulating phases. Due to their remarkable versatility, cold-atom systems are ideally suited to realize topological states of matter and drive the development of topological quantum computing.

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