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Author Zapata, I. ♦ Wunsch, B. ♦ Zinner, N. T. ♦ Demler, E.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ MATERIALS SCIENCE ♦ FERMIONS ♦ ORDER PARAMETERS ♦ OSCILLATIONS ♦ PAIRING INTERACTIONS ♦ PARITY ♦ PHASE STABILITY ♦ PHASE STUDIES ♦ POTENTIALS ♦ SPIN ♦ SUPERFLUIDITY ♦ ANGULAR MOMENTUM ♦ DIMENSIONLESS NUMBERS ♦ INTERACTIONS ♦ PARTICLE PROPERTIES ♦ STABILITY
Abstract We study a balanced two-component system of ultracold fermions in one dimension with attractive interactions and subject to a spin-dependent optical lattice potential of opposite sign for the two components. We find states with different types of modulated pairing order parameters which are conceptually similar to {pi} phases discussed for superconductor-ferromagnet heterostructures. Increasing the lattice depth induces sharp transitions between states of different parity. While the origin of the order parameter oscillations is similar to the Fulde-Ferrel-Larkin-Ovchinnikov phase for paired states with spin imbalance, the current system is intrinsically stable to phase separation. We discuss experimental requirements for creating and probing these novel phases.
ISSN 00319007
Educational Use Research
Learning Resource Type Article
Publisher Date 2010-08-27
Publisher Place United States
Journal Physical Review Letters
Volume Number 105
Issue Number 9


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