The BCS-BEC Crossover

Abstract

This chapter presents the crossover from the Bardeen-Cooper-Schrieffer (BCS) state of weakly-correlated pairs of fermions to the Bose-Einstein condensation (BEC) of diatomic molecules in the atomic Fermi gas. Our aim is to provide a pedagogical review of the BCS-BEC crossover, with an emphasis on the basic concepts, particularly those that are not generally known or are difficult to find in the literature. We shall not attempt to give an exhaustive survey of current research in the limited space here; where possible, we will direct the reader to more extensive reviews.

19 pages, 6 figures. This article will be published as Chapter 9 in "Quantum gas experiments - exploring many-body states", edited by P. Torma and K. Sengstock, Imperial College Press, London, to be published 2014

References in corpus (13)

• Many-Body Physics with Ultracold Gases
• Theory of ultracold Fermi gases
• Vortices and Superfluidity in a Strongly Interacting Fermi Gas
• Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
• Revealing the Superfluid Lambda Transition in the Universal Thermodynamics of a Unitary Fermi Gas
• Weakly bound dimers of fermionic atoms
• Molecular Probe of Pairing in the BEC-BCS Crossover
• Evidence for Superfluidity of Ultracold Fermions in an Optical Lattice
• Observation of pseudogap behavior in a strongly interacting Fermi gas
• Universal Properties of the Ultra-Cold Fermi Gas
• Resonantly Interacting Fermions In a Box
• Critical Temperature Curve in the BEC-BCS Crossover
• Thermodynamics of balanced and slightly spin-imbalanced Fermi gases at unitarity

Cited by in corpus (11)

• The Fulde-Ferrell-Larkin-Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review
• Peaks of sound velocity in two color dense QCD: quark saturation effects and semishort range correlations
• New mechanism and exact theory of superconductivity from strong repulsive interaction
• Universality of the unitary Fermi gas: A few-body perspective
• (Self-)Magnetized Bose-Einstein Condensate stars
• Signatures of the BCS-BEC crossover in the yrast spectra of Fermi quantum rings
• Chiral twodimensional p-wave superfluid from s-wave pairing in the BEC regime
• Accurate projective two-band description of topological superfluidity in spin-orbit-coupled Fermi gases
• Boson-fermion pairing and condensation in two-dimensional Bose-Fermi mixtures
• Magnetized vector boson gas at any temperature
• When does a Fermi puddle become a Fermi sea? Emergence of pairing in two-dimensional trapped mesoscopic Fermi gases