Conserving T-matrix theory of superconductivity
arXiv:0906.3677 · doi:10.1103/PhysRevB.84.094529
Abstract
We remove a self-interaction from the Galitskii-Feynman T-matrix approximation. This correction has no effect in the normal state but makes the theory applicable to the superconducting state. It is shown that identical theory is obtained by removing nonphysical repeated collisions in the spirit of the Fadeev-Watson-Lovelace multiple scattering expansion. Our correction does not violate the two-particle symmetry of the T-matrix, therefore the present theory is conserving in the Baym-Kadanoff sense. The theory is developed for retarded interactions leading to the Eliashberg theory in the approximation of a single pairing channel.
4 pages, 2 figures
References in corpus (19)
- Many-Body Physics with Ultracold Gases
- Color superconductivity in dense quark matter
- Neutron Star Cooling
- Thermodynamics of the BCS-BEC crossover
- Superconductivity in CVD Diamond Thin Film Well-Above Liquid Helium Temperature
- Spectral Functions and rf Response of Ultracold Fermionic Atoms
- Superfluid phase diagrams of trapped Fermi gases with population imbalance
- Thermodynamics and superfluid density in BCS-BEC crossover with and without population imbalance
- Electronic structure of strongly correlated d-wave superconductors
- First and second sound modes at finite temperature in trapped Fermi gases from BCS to BEC
- Superfluidity with dressed nucleons
- Understanding the Protected Nodes and Collapse of the Fermi Arcs in Underdoped Cuprate Superconductors
- Superfuid-insulator transitions at non-integer filling in optical lattices of fermionic atoms
- Radio Frequency Spectroscopy of Trapped Fermi Gases with Population Imbalance
- Superconductivity in the quasi-two-dimensional Hubbard model
- Time-dependent Ginzburg-Landau theory with floating nucleation kernel; FIR conductivity in the Abrikosov vortex lattice
- Generalized Galitskii approach for the vertex function of a Fermi gas with resonant interaction
- Equivalence of channel-corrected T-matrix and anomalous propagator approach
- Asymmetric Bethe-Salpeter equation for pairing and condensation
Cited by in corpus (7)
- When Superconductivity Crosses Over: From BCS to BEC
- Anomalous propagators and the particle-particle channel: Hedin's equations
- Coexistence of phase transitions and hysteresis near BEC
- Stability of condensate in superconductors
- Bipolaron formed through electron-hole excitation
- Interaction-Range Effects and Universality in the BCS-BEC Crossover of Spin-Orbit Coupled Fermi Gases
- Bose condensation of squeezed light