Thermoelectric properties of the (an-)isotropic QGP in magnetic fields

Abstract

The Seebeck effect and the Nernst effect, which reflect the appearance of electric fields along x-axis and along y-axis ($$E_{x}$$ E x and $$E_{y}$$ E y ), respectively, induced by the thermal gradient along x-axis, are studied in the QGP at an external magnetic field along z-axis. We calculate the associated Seebeck coefficient ($$S_{xx}$$ S xx ) and Nernst signal (N) using the relativistic Boltzmann equation under the relaxation time approximation. In an isotropic QGP, the influences of magnetic field (B) and quark chemical potential ($$\mu _{q}$$ μ q ) on these thermoelectric transport coefficients are investigated. In the presence (absence) of weak magnetic field, we find $$S_{xx}$$ S xx for a fixed $$\mu _{q}$$ μ q is negative (positive) in sign, indicating that the dominant carriers for converting heat gradient to electric field are negatively (positively) charged quarks. The absolute value of $$S_{xx}$$ S xx decreases with increasing temperature. Unlike $$S_{xx}$$ S xx , the sign of N is independent of charge carrier type, and its thermal behavior displays a peak structure. In the presence of strong magnetic field, due to the Landau quantization of transverse motion of (anti-)quarks perpendicular to magnetic field, only the longitudinal Seebeck coefficient ($$S_{zz}$$ S zz ) exists. Our results show that the value of $$S_{zz}$$ S zz at a fixed $$\mu _{q}$$ μ q in the lowest Landau level (LLL) approximation always remains positive. Within the effect of high Landau levels, $$S_{zz}$$ S zz exhibits a thermal structure similar to that in the LLL approximation. As the Landau level increases further, $$S_{zz}$$ S zz decreases and even its sign changes from positive to negative. The computations of these thermoelectric transport coefficients are also extended to a medium with momentum-anisotropy induced by initial spatial expansion as well as strong magnetic field.

Responses of quark-antiquark interaction and heavy quark dynamics to magnetic field

“…Therefore, the retarded component of the real part of gluon self-energy from quark-loop in the strongly magnetized QCD medium is given as ReΠ 00 R,q = ReΠ 00 11 = ReΠ 00 11,T=0 + ReΠ 00 11,T =0 , which is consistent with the result obtained from the semi-classical kinetic theory at strong magnetic field [59].…”

Black hole superradiance in dynamical Chern-Simons gravity

“…Black hole superradiance has since been studied for a wide range of cases, including for scalars in a variety of limits [37][38][39][40][41][42][43][44][45][46][47][48][49][50], as well as for vector and tensor fields [51][52][53][54][55][56][57][58]. Superradiance has also been studied in a range of modified theories of gravity [59][60][61][62][63], however a full analytical analysis of black hole superradiance in dCS gravity is missing from the literature until now.…”

Holographic Schwinger effect in the dynamical AdS/QCD model

“…In the further research, the magnetic field has significant influences on the QCD matter and phase diagram [42][43][44]. The interesting properties of the magnetic field drew much attention in different subjects [45][46][47][48][49][50][51][52].…”