Detecting the breached pair phase in a polarized ultracold Fermi gas

Abstract

We propose a method for the experimental detection of a new quantum phase, the breached pair state, in a strongly interacting ultracold Fermi gas with population imbalance. We show that through the time-of-flight Raman imaging, the presence of such a phase can be unambiguously determined with a measurement of the momentum-space phase separation of the minority spin component. To guide the experimental efforts, the momentum-space density profiles are calculated under typical experimental conditions.

4 pages, 3 figures, replaced with the published version

References in corpus (4)

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Vortices and Superfluidity in a Strongly Interacting Fermi Gas
• Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
• Phase diagram of a polarized Fermi gas across a Feshbach resonance in a potential trap

Cited by in corpus (10)

• Measuring the one-particle excitations of ultracold fermionic atoms by stimulated Raman spectroscopy
• The FFLO state in the one-dimensional attractive Hubbard model and its fingerprint in the spatial noise correlations
• Mixtures of ultracold fermions with unequal masses
• Superfluid shells for trapped fermions with mass and population imbalance
• General Hubbard model for strongly interacting fermions in an optical lattice and its phase detection
• Probing quasi-particle states in strongly interacting atomic gases by momentum-resolved Raman photoemission spectroscopy
• Finite temperature phase diagram of trapped Fermi gases with population imbalance
• Noise correlations of the ultra-cold Fermi gas in an optical lattice
• Unconventional interaction between vortices in a polarized Fermi gas
• Breached pair superfluidity: a brief review