Scale Invariance in 2D BCS-BEC Crossover

ORAL

Abstract

In 2D BCS-BEC crossover, the frequency of the breathing mode in a harmonic trap , as well as the lower edge of the radio frequency spectroscopy response, show remarkable scale-invariance throughout the crossover regime, i.e. they are independent of the coupling constant. Using functional integral methods, we study the behaviour of these quantities in the 2D BCS-BEC crossover and comment on the possible reasons for this scale independence.

*RS was supported by DAE, Govt. of India. MR was supported by NSF Grant No. DMR-1006532. ET was supported by NSERC and the Canadian Institute for Advanced Research.

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Authors

  • Rajdeep Sensarma

    • Tata Institute of Fundamental Research, Mumbai, India
    • Tata Institute of Fundamental Research

  • Catherine Kallin

    • McMaster University
    • Mcmaster University

  • Mohit Randeria

    • The Ohio State Universitry
    • The Ohio State University