Creating p-wave superfluids and topological excitations in optical lattices

Journal Article · Mon Mar 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.031607· OSTI ID:21408356

Massignan, P ^[1]; Sanpera, A ^[2]; Lewenstein, M ^[1]

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1. ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, E-08860 Castelldefels, Barcelona (Spain)
2. Grup de Fisica Teorica, Universitat Autonoma de Barcelona, E-08193 Bellaterra (Spain)

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.

• OSTI ID: 21408356
• Journal Information: Physical Review. A, Vol. 81, Issue 3; Other Information: DOI: 10.1103/PhysRevA.81.031607; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
BOSONS
D WAVES
EXCITATION
FERMIONS
INTERACTIONS
P WAVES
SPECTRA
SUPERFLUIDITY
SYMMETRY
TOPOLOGY
ENERGY-LEVEL TRANSITIONS
MATHEMATICS
PARTIAL WAVES