Energy density and susceptibility of warm and dense quark matter

Kausik Pal

Serampore College, Serampore, Hooghly, Pin - 712201.

The expressions for the ground state energy (GSE) density and the spin susceptibility of warm and dense interacting quark matter have been derived including the corrections due to correlations. For this, we have calculated the GSE of spin-polarized quark matter at non-zero temperature containing the term up to order (g4ln g2). It has been shown that, χ-1 changes sign and turns negative at different temperatures for different densities, which indicates a physical instability or impermanence of ordered phase of quark matter.