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Creating p-wave superfluids and topological excitations in optical lattices

P. Massignan, A. Sanpera, and M. Lewenstein
Phys. Rev. A 81, 031607(R) – Published 22 March 2010

Abstract

We propose to realize a p-wave superfluid using bosons mixed with a single species of fermions in a deep optical lattice. We analyze with a self-consistent method its excitation spectrum in presence of a vortex, and we point out the range of interaction strengths in which the zero-energy mode with topological character exists on a finite optical lattice. Lattice effects are strongest close to fermionic half filling: here the linearity of the low-lying spectrum is lost, and a new class of extended zero-energy modes with checkerboard structure and d-wave symmetry appears.

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  • Received 23 September 2009

DOI:https://doi.org/10.1103/PhysRevA.81.031607

©2010 American Physical Society

Authors & Affiliations

P. Massignan1,2, A. Sanpera2,3, and M. Lewenstein1,3

  • 1ICFO-Institut de Ciències Fotòniques, Mediterranean Technology Park, E-08860 Castelldefels, Barcelona, Spain
  • 2Grup de Física Teórica, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain
  • 3ICREA-Institució Catalana de Recerca i Estudis Avançats, E-08010 Barcelona, Spain

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Issue

Vol. 81, Iss. 3 — March 2010

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