Abhijit Bhattacharyya

Relics of the cosmological QCD phase transition

The abundance and size distribution of quark nuggets (QN), formed a few microseconds after the big bang due to first order QCD phase transition in the early universe, has been estimated. It appears that stable QNs could be a viable candidate for cosmological dark matter. The evolution of baryon inhomogeneity due to evaporated (unstable) QNs are also examined.

Investigation of the phase diagram and bulk thermodynamic properties using the Polyakov-Nambu-Jona-Lasinio model with eight-quark interactions

We present the bulk thermodynamic properties and phase diagram of strongly interacting matter in an extension of the 3-flavor Nambu\char21{}Jona-Lasinio (NJL) and Polyakov\char21{}Nambu\char21{}Jona-Lasinio (PNJL) models of QCD. Using a three-momentum cutoff scheme, we have extended the multiquark interaction terms up to eight order so that the stability of the vacuum is ensured in these models. We explore the effects of various combinations of the two eight-quark couplings

Correlation between conserved charges in PNJL Model with multi-quark interactions

{g}_{1}

Susceptibilities with multiquark interactions in the Polyakov-Nambu-Jona-Lasinio model

and

Conversion of a neutron star to a strange star: A two-step process

{g}_{2}

Cosmological dark energy from the cosmic QCD phase transition and colour entanglement

and present a comparative study between the NJL and PNJL models as well as lattice QCD data. The main effect of the eight-quark interaction term is to shift the critical end point in the

Massive Compact Halo Objects from the relics of the cosmic quark-hadron transition

T\ensuremath{-}\ensuremath{\mu}

Thermodynamics and fluctuations of conserved charges in a hadron resonance gas model in a finite volume

phase diagram to a lower value of

Thermodynamic properties of strongly interacting matter in a finite volume using the Polyakov–Nambu–Jona-Lasinio model

\ensuremath{\mu}

Fluctuation of strongly interacting matter in the Polyakov–Nambu–Jona-Lasinio model in a finite volume

and a higher value of