Composite fermions and quartets in the Fermi-Bose mixture with attractive interaction between fermions and bosons

2002/09/20 by M. Yu. Kagan, I. V. Brodsky, Kagan, M. Yu. +5
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Quantum, superfluid, helium dynamics #Soft Condensed Matter (cond-mat.soft) #Strongly Correlated Electrons (cond-mat.str-el)

paper · pdf · doi:10.48550/arxiv.cond-mat/0209481

openalex publication_date 2002/09/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We consider a model of Fermi-Bose mixture with strong hard-core repulsion between particles of the same sort and attraction between particles of different sorts. In this case, besides the standard anomalous averages of the type <b>; and, a pairing between fermion and boson of the type bc is possible. This pairing corresponds to a creation of composite fermions in the system. At low temperatures and equal densities of fermions and bosons composite fermions are further paired in quartets. Our investigations are important for high-T_c superconductors and in connection with recent observation of weakly bound dimers in magnetic traps at ultralow temperatures.</b>

Related

• Condensation of Composite Bosonic Trions in Interacting Bose-Fermi Mixtures
• Composite-boson formalism applied to strongly bound fermion pairs in a one-dimensional trap
• Strongly interacting Bose-Fermi mixtures in 4-ε dimensions
• Collapse of Bose component in Bose-Fermi mixture with attraction between components
• Composite Bosons Superposition Ansatz Approach to One-Dimensional Trapped Few-Fermion Systems