Finite chemical potential splits particle and antiparticle phases in the homogeneous solution of the statistical propagator, yielding a transient interference pattern erased by damping.
The effect of an imaginary part of the Schwinger-Dyson equation at finite temperature and density
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abstract
We examined the effect of an imaginary part of the ladder approximation Schwinger-Dyson equation. We show the imaginary part enhances the effect of the first order transition, and affects a tricritical point. In particular, a chemical potential at a tricritical point is moved about 200(MeV). Thus, one should not ignore the imaginary part. On the other hand, since an imaginary part is small away from a tricritical point, one should be able to ignore an imaginary part. In addition, we also examined the contribution of the wave function renormalization constant.
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Nonequilibrium coherent effects at finite chemical potential
Finite chemical potential splits particle and antiparticle phases in the homogeneous solution of the statistical propagator, yielding a transient interference pattern erased by damping.