QCD Equation of State at nonzero baryon density in external magnetic field
Physical Review D(2024)
摘要
This paper is devoted to the study of QCD equation of state in external
magnetic field and nonzero baryon density. Our study is carried out by means of
lattice simulation with 2+1 dynamical staggered quarks at the physical masses.
The simulation is conducted at imaginary baryon chemical potential what allowed
us to overcome the sign problem. We expand the pressure in the baryon imaginary
chemical potential and study three leading nonzero coefficients in this
expansion. These coefficients were calculated for the following values of
magnetic field: eB=0.3, 0.6, 1.2 GeV^2 with the lattice sizes
8×32^3, 10×40^3, 12×48^3. Using these data we take
continuum limit for the coefficients. Our results indicate considerable
enhancement of the expansion coefficients by the magnetic field.
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