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Strongly resonant p-wave superfluids.

J Levinsen1, N R Cooper, V Gurarie

  • 1Institute for Theoretical Physics, University of California Santa Barbara, Santa Barbara, California 93106, USA.

Physical Review Letters
|February 1, 2008
PubMed
Summary
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We theoretically investigate p-wave resonant superfluids, identifying distinct weak and strong regimes. Strongly resonant superfluids are unstable, forming fermionic trimers instead of expected pairs.

Area of Science:

  • Quantum physics
  • Ultracold atomic gases
  • Condensed matter theory

Background:

  • Fermionic superfluids are crucial in condensed matter physics.
  • P-wave interactions are less understood than s-wave interactions in fermionic systems.
  • Resonant interactions offer a unique pathway to explore novel quantum states.

Purpose of the Study:

  • To theoretically investigate the behavior of dilute Fermi gases with p-wave interactions.
  • To identify and characterize different regimes of p-wave resonant superfluids.
  • To analyze the stability of these superfluids and their potential decay mechanisms.

Main Methods:

  • Theoretical modeling of identical fermions with p-wave resonance.
  • Analysis of superfluid stability based on microscopic interaction details.

Related Experiment Videos

  • Estimation of molecular lifetimes due to collisional relaxation.

    • Main Results:

    • Two distinct regimes of p-wave resonant superfluids were identified: 'weak' and 'strong'.
    • Strongly resonant p-wave superfluids are unstable and decay into fermionic trimers.
    • The lifetime of p-wave molecules was estimated in the context of collisional relaxation.

    Conclusions:

    • The stability of p-wave superfluids is highly dependent on the microscopic interaction details.
    • The formation of fermionic trimers presents a significant challenge for achieving p-wave superfluids in the strongly resonant regime.
    • Understanding these regimes is crucial for guiding experimental efforts in creating and observing p-wave superfluids.