The BCSBEC Crossover and the Unitary Fermi GasRecent experimental and theoretical progress has elucidated the tunable crossover, in ultracold Fermi gases, from BCStype superconductors to BECtype superfluids.
The BCSBEC Crossover and the Unitary Fermi Gas is a collaborative effort by leading international experts to provide an uptodate introduction and a comprehensive overview of current research in this fastmoving field.
It is now understood that the unitary regime that lies right in the middle of the crossover has remarkable universal properties, arising from scale invariance, and has connections with fields as diverse as nuclear physics and string theory. This volume will serve as a first point of reference for active researchers in the field, and will benefit the many nonspecialists and graduate students who require a selfcontained, approachable exposition of the subject matter.

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Contents
1 The BCSBEC Crossover and the Unitary Fermi Gas  1 
2 The BECBCS Crossover Some History and Some General Observations  33 
3 Crossovers in Unitary Fermi Systems  49 
4 Pairing Fluctuations Approach to the BCSBEC Crossover  98 
5 The Unitary Gas and its Symmetry Properties  127 
6 Universal Relations for Fermions with Large Scattering Length  193 
7 Unitary Fermi Gas ε Expansion and Nonrelativistic Conformal Field Theories  232 
8 Dilute Fermi and Bose Gases  277 
9 The Unitary Fermi Gas From Monte Carlo to Density Functionals  305 
10 Scaling Flows and Dissipation in the Dilute Fermi Gas at Unitarity  374 
11 Thermodynamics of Fermi Gases  407 
12 Normal Phase of Polarised Strongly Interacting Fermi Gases  447 
13 Thermodynamics of Trapped Imbalanced Fermi Gases at Unitarity  477 
14 BCSBEC Crossover and Unconventional Superfluid Order in One Dimension  503 