Abstract

GOMEZ, Edgar A; HERNANDEZ-RIVERO, J. D.  and  VINCK-POSADA, Herbert. Green’s functions technique for calculating the emission spectrum in a quantum dot-cavity system. Pap. Phys. [online]. 2016, vol.8, n.2, pp.01-07. ISSN 1852-4249.  http://dx.doi.org/10.4279/PIP.080008.

We introduce the Green's functions technique as an alternative theory to the quantum regression theorem formalism for calculating the two-time correlation functions in open quantum systems at the steady state. In order to investigate the potential of this theoret-ical approach, we consider a dissipative system composed of a single quantum dot inside a semiconductor cavity and the emission spectrum is computed due to the quantum dot as well as the cavity. We propose an algorithm based on the Green's functions technique for computing the emission spectrum that can easily be adapted to more complex open quantum systems. We found that the numerical results based on the Green's functions technique are in perfect agreement with the quantum regression theorem formalism. More-over, it allows overcoming the inherent theoretical difficulties associated with the direct application of the quantum regression theorem in open quantum systems.

Keywords : microcavity, master equation, open quantum system, QD-Cavity.

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