EPJ Web of Conferences
Volume 7, 2010DM2008 – Dense Matter in Heavy-Ion Collisions and Astrophysics
|Number of page(s)||21|
|Published online||05 October 2010|
Relativistic BCS-BEC Crossover at Quark Level
Physics Department, Tsinghua University,
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
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