https://doi.org/10.1051/epjconf/20100701007
Relativistic BCS-BEC Crossover at Quark Level
Physics Department, Tsinghua University,
Beijing
100084,
China
The non-relativistic G0G formalism of BCS-BEC crossover at finite temperature is extended to relativistic fermion systems. The theory recovers the BCS mean field approximation at zero temperature and the non-relativistic results in a proper limit. For massive fermions, when the coupling strength increases, there exist two crossovers from the weak coupling BCS superfluid to the non-relativistic BEC state and then to the relativistic BEC state. For color superconductivity at moderate baryon density, the matter is in the BCS-BEC crossover region, and the behavior of the pseudogap is quite similar to that found in high temperature superconductors.
© Owned by the authors, published by EDP Sciences, 2010
