Phase separation in asymmetrical fermion superfluids

Abstract

Motivated by recent developments on cold atom traps and high density QCD we consider fermionic systems composed of two particle species with different densities. We argue that a mixed phase composed of normal and superfluid components is the energetically favored ground state. We suggest how this phase separation can be used as a probe of fermion superfluidity in atomic traps.

9 pages, LaTeX2e, version to appear in Phys.Rev.Lett

References in corpus (4)

• Observation of a Strongly-Interacting Degenerate Fermi Gas of Atoms
• Gapless two-flavor color superconductor
• Breached pairing superfluidity: Possible realization in QCD
• Superfluidity in the interior-gap states

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• The Trapped Polarized Fermi Gas at Unitarity
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• Gapless Surfaces in Anisotropic Superfluids
• Pairing in Asymmetric Many-Fermion Systems: Functional Renormalisation Group Approach
• Out-of-Equilibrium Spin Transport in Mesoscopic Superconductors
• Dimensional Crossover in a Spin-imbalanced Fermi gas
• Superfluidity of a spin-imbalanced Fermi gas in a three-dimensional optical lattice
• Surface Energy in Cold Asymmetrical Fermion Superfluids
• Relativistic BCS-BEC crossover of a two-species Fermi gas with number density asymmetry at zero temperature
• Metric-space approach for distinguishing quantum phase transitions in spin-imbalanced systems
• Polarized fermions in the unitarity limit
• Chiral twodimensional p-wave superfluid from s-wave pairing in the BEC regime
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• Temperature Effects in a Fermi Gas with Population Imbalance
• Polarized superfluids near their tricritical point
• Quantum condensation in electron-hole bilayers with density imbalance
• Unconventional interaction between vortices in a polarized Fermi gas
• Heteronuclear fermionic superfluids with spin degrees of freedom
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• LOFF and breached pairing with cold atoms
• Application of renormalized RPA to polarized Fermi gases
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• Pairing in Asymmetrical Fermi Systems with Intra- and Inter-Species Correlations
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• Critical Zeeman Splitting of a Unitary Fermi Superfluid
• Topological Phase Separation In Trapped Ultracold Fermionic Gases
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• Induced superfluidity of imbalanced Fermi gases near unitarity
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• Pairing in spin polarized two-species fermionic mixtures with mass asymmetry
• Pair condensation of polarized fermions in the BCS-BEC crossover
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• Nuclear systems under extreme conditions: isospin asymmetry and strong B-fields
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• Breached pair superfluidity: a brief review