Somenath Chakrabarty

Chiral properties of the QCD vacuum in ultrastrong magnetic fields: A Nambu-Jona-Lasinio model with a semiclassical approximation

The breaking of chiral symmetry of light quarks at zero temperature in the presence of strong quantizing magnetic field is studied using a Nambu-Jona-Lasinio (NJL) model with a Thomas-Fermi-type semiclassical formalism. It is found that the dynamically generated light quark mass can never become zero if the Landau levels are populated and increases with the increase of magnetic field strength.

Neutron star equation of state and the possibility of complex self-energy in Landau theory of a Fermi liquid in the presence of a strong, quantizing magnetic field

Using the relativistic version of Landau theory of Fermi liquid with

On the crustal matter of magnetars

\ensuremath{\sigma}\text{\ensuremath{-}}\ensuremath{\omega}

The study of relatively low density stellar matter in presence of strong quantizing magnetic field

and \ensuremath{\rho} mesons exchange, we have obtained an equation state for dense neutron star matter in the presence of a strong, quantizing magnetic field. It is found that in this scenario the self-energies of both neutron and proton components of dense neutron star matter become complex under certain physical conditions. To be more specific, it is observed that in the exchange diagrams of

Expulsion of magnetic flux lines from the growing superconducting core of a magnetised quark star

\ensuremath{\sigma},\ensuremath{\omega}

The upper limit of magnetic field strength in dense stellar hadronic matter

and neutral \ensuremath{\rho} transfer processes and in the direct interaction diagram with

Which is heavier—d oru quark?

{\ensuremath{\rho}}_{\ifmmode\pm\else\textpm\fi{}}

Saha equation in Rindler space

transfer reactions, the nucleon self-energies become complex in nature.

On a possible mechanism of low surface magnetic field structure of quark stars

Abstract.We have investigated some of the properties of dense sub-nuclear matter at the crustal region (both the outer crust and the inner crust region) of a magnetar. The relativistic version of the Thomas-Fermi (TF) model is used in the presence of a strong quantizing magnetic field for the outer crust matter. The compressed matter in the outer crust, which is a crystal of metallic iron, is replaced by a regular array of spherically symmetric Wigner-Seitz (WS) cells. In the inner crust region, a mixture of iron and heavier neutron-rich nuclei along with electrons and free neutrons has been considered. Conventional Harrison-Wheeler (HW) and Bethe-Baym-Pethick (BBP) equation of states are used for the nuclear mass formula. A lot of significant changes in the characteristic properties of dense crustal matter, both at the outer crust and at the inner crust, have been observed.

The effects of strong quantizing magnetic fields on the cold emission of electrons from ultramagnetized compact stellar objects

Abstract The effect of strong quantizing magnetic field on the equation of state of matter at the outer crust region of magnetars is studied. The density of such matter is low enough compared to the matter density at the inner crust or outer core region. Based on the relativistic version of semi-classical Thomas–Fermi–Dirac model in presence of strong quantizing magnetic field a formalism is developed to investigate this specific problem. The equation of state of such low density crustal matter is obtained by replacing the compressed atoms/ions by Wigner–Seitz cells with nonuniform electron density. The results are compared with other possible scenarios. The appearance of Thomas–Fermi induced electric charge within each Wigner–Seitz cell is also discussed.