When superconductivity crosses over: From BCS to BEC

Q Chen, Z Wang, R Boyack, S Yang, K Levin - Reviews of Modern Physics, 2024 - APS
New developments in superconductivity, particularly through unexpected and often
surprising forms of superconducting materials, continue to excite the community and …

Review of pseudogaps in strongly interacting Fermi gases

EJ Mueller - Reports on Progress in Physics, 2017 - iopscience.iop.org
A central challenge in modern condensed matter physics is develo** the tools for
understanding nontrivial yet unordered states of matter. One important idea to emerge in this …

Introduction to superfluidity

A Schmitt - Lect. Notes Phys, 2015 - Springer
This course is about the theory of low-energy and high-energy, non-relativistic and
relativistic, bosonic and fermionic superfluidity and superconductivity. Does that sound too …

Quantum geometric contributions to the BKT transition: Beyond mean field theory

Z Wang, G Chaudhary, Q Chen, K Levin - Physical Review B, 2020 - APS
We study quantum geometric contributions to the Berezinskii-Kosterlitz-Thouless (BKT)
transition temperature T BKT in the presence of fluctuations beyond BCS theory. Because …

Ground-State Thermodynamic Quantities of Homogeneous Spin- Fermions from the BCS Region to the Unitarity Limit

M Horikoshi, M Koashi, H Tajima, Y Ohashi… - Physical Review X, 2017 - APS
The understanding of physical properties of fermions in the unitary regime, where the s-
wave scattering length in the collisional channel of particles is longer than both the …

Fermi gas throughout the BCS-BEC crossover: Comparative study of -matrix approaches with various degrees of self-consistency

M Pini, P Pieri, GC Strinati - Physical Review B, 2019 - APS
The diagrammatic t-matrix approximation has often been adopted to describe a dilute Fermi
gas. This approximation, originally considered by VM Galitskii (Zh. Eksp. Teor. Fiz. 34, 151 …

In-gap states of a quantum dot coupled between a normal and a superconducting lead

J Barański, T Domański - Journal of Physics: Condensed Matter, 2013 - iopscience.iop.org
We study the in-gap states of a quantum dot hybridized with one conducting and another
superconducting electrode. The proximity effect suppresses the electronic states in the entire …

BCS-BEC crossover of atomic Fermi superfluid in a spherical bubble trap

Y He, H Guo, CC Chien - Physical Review A, 2022 - APS
We present a theory of a two-component atomic Fermi gas with tunable attractive contact
interactions on a spherical shell going through the Bardeen-Cooper-Schrieffer (BCS)–Bose …

Comparative study of BCS-BEC crossover theories above : The nature of the pseudogap in ultracold atomic Fermi gases

CC Chien, H Guo, Y He, K Levin - Physical Review A—Atomic, Molecular, and …, 2010 - APS
This article presents a comparison of two finite-temperature BCS–Bose-Einstein
condensation (BEC) crossover theories above the transition temperature: Nozieres–Schmitt …

The pseudogap regime in the unitary Fermi gas

S Jensen, CN Gilbreth, Y Alhassid - The European Physical Journal …, 2019 - Springer
We discuss the pseudogap regime in the unitary Fermi gas (UFG), with a particular
emphasis on the auxiliary-field quantum Monte Carlo (AFMC) approach. We discuss …