With the improvement of the experimental techniques, many new phenomena in which the photon degrees of freedom are involved have been discovered. Typical examples are the exciton-polariton quasiparticles, excitons strongly coupled to photons. A correct description of these systems requires a full account of the photon's dynamics, including the vector gauge degrees of freedom. In order to include this contribution in ab initio many-body perturbation theories, here we present a generalization of the Hedin equations, originally derived for a many-electron system with Coulomb interaction. These equations are now derived to take into account the strong-coupling physics of the electrons and the transverse photon's degrees of freedom.
Hedin equations in resonant microcavities
Trevisanutto P. E.
;
2015-01-01
Abstract
With the improvement of the experimental techniques, many new phenomena in which the photon degrees of freedom are involved have been discovered. Typical examples are the exciton-polariton quasiparticles, excitons strongly coupled to photons. A correct description of these systems requires a full account of the photon's dynamics, including the vector gauge degrees of freedom. In order to include this contribution in ab initio many-body perturbation theories, here we present a generalization of the Hedin equations, originally derived for a many-electron system with Coulomb interaction. These equations are now derived to take into account the strong-coupling physics of the electrons and the transverse photon's degrees of freedom.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.