Deconfinement Phase Transition with External Magnetic Field in the Friedberg—Lee Model

Deconfinement Transition in the Presence of a Magnetic Field

Eduardo S. Fraga, Jorge Noronha and Let́ıcia F. Palhares Instituto de F́ısica, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, Rio de Janeiro, RJ 21941-972, Brazil Instituto de F́ısica, Universidade de São Paulo, C.P. 66318, 05315-970 São Paulo, SP, Brazil Instituto de F́ısica, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, Maracanã, Rio de Janeiro, RJ 20550-013...

Magnetic field induced confinement-deconfinement transition in graphene quantum dots.

Massless Dirac particles cannot be confined by an electrostatic potential. This is a problem for making graphene quantum dots but confinement can be achieved with a magnetic field and here general conditions for confined and deconfined states are derived. There is a class of potentials for which the character of the state can be controlled at will. Then a confinement-deconfinement transition oc...

Entanglement in the XZ spin chain model in the external magnetic field

The entanglement at zero-temperature is studied in a two-qubit XZ spin-1/2 chain model in anexternal magnetic field which is applied in the z direction. We have obtained an analytical relation forthe effect of the external magnetic field on the concurrence. It is shown that the ground state of thesystem depends on the strength of exchange coupling. We have shown that the analytical relation oft...

Deconfinement Phase Transition in QCD

The deconfinement phase transition, hadronization and the NJL model

energy effective theories of QCD. Quantum Chromodynamics (QCD) is believed to be the underlying theory of strong interactions. Although enormously successful, inasmuch as it is part of the standard model of physical interactions, the applicability of QCD is studying nuclear interactions or hadronic processes at low energies is still limited. The difficulties are largely technical, associated wi...