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A Bosonic Topological Phase in a Paired Superfluid by Gazit, Snir; Vishwanath, Ashvin is a scholarly article available to read on EtoBox.

What is A Bosonic Topological Phase in a Paired Superfluid about?

We study an effective model of two interacting species of bosons in two dimensions, which is amenable to sign problem free Monte Carlo simulations. In addition to conventional ground states, we access a paired superfluid which is also a topological phase, protected by the remaining $U(1) \times \mathbb{Z}_2$ symmetry. This phase arises from the condensation of a composite object, the bound state of vortices and anti-vortices of one species, to a boson of the second species. We introduce a bulk response function, the Ising analog of the quantized Hall effect, to diagnose the topological phase. The interplay of broken symmetry and topology leads to interesting effects such as fractionally charged vortices in the paired superfluid. Possible extensions towards realistic models of cold atomic bosons are discussed.

Author

Gazit, Snir; Vishwanath, Ashvin

Published

2015

Language

EN