Biexciton-like quartet condensates in an electron-hole liquid

Abstract

We theoretically study the ground-state properties and the condensations of exciton-like Cooper pairs and biexciton-like Cooper quartets in an electron-hole system. Applying the variational approach associated based on the quartet Bardeen-Cooper-Schrieffer (BCS) model to the four-component fermionic system consisting of spin-1/2 electrons and spin-1/2 holes, we show how Cooper pairs and quartet correlations appear in the equation of state at the thermodynamic limit. The biexciton-like four-body correlations survive even at the high-density regime as a many-body BCS-like state of Cooper quartets. Our results are useful for further understanding of exotic matter in the interdisciplinary context of quantum many-body physics with multiple degrees of freedom.

arXiv comment10 pages, 4 figures

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Cited by in corpus (8)

• Cooper quartet correlations in infinite symmetric nuclear matter
• Quartet Superfluid in Two-dimensional Mass-imbalanced Fermi Mixtures
• Role of the effective range in the density-induced BEC-BCS crossover
• Stability against three-body clustering in one-dimensional spinless p-wave fermions
• Competition between pairing and tripling in one-dimensional fermions with coexistent s- and p-wave interactions
• Quartet correlations near the surface of $N=Z$ nuclei
• Cooper pairing and tripling in one-dimensional spinless fermions with attractive two- and three-body forces
• Mass-imbalance effect on the cluster formation in a one-dimensional Fermi gas with coexistent $s$- and $p$-wave interactions