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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12610/62769
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