Regensburg 2016 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 70: Semiconductor Lasers I

HL 70.1: Vortrag

Donnerstag, 10. März 2016, 09:30–09:45, H13

Few quantum emitters – small cavities: exact treatment of the electron-photon coupling in mesoscopic quantum devices — •Michael Gegg, Andreas Knorr, and Marten Richter — Institut für Theoretische Physik, Nichtlineare Optik und Quantenelektronik, Technische Universität Berlin, Germany

Open many body quantum systems consisting of N quantum emitters (QEs), e.g. dye molecules or quantum dots, coupled to a lossy cavity/optical mode have been subject to extensive research for decades. These systems can be described by N two- (multi-) level systems interacting with bosonic cavity modes including dissipation and pumping in the Lindblad formalism. This provides access to a manifold of interesting applications, such as lasers, parametric amplifiers for normal cavities and spasers or surface plasmon generators for metallic systems.
We develop an exact and numerically scalable solution to the N multi-level system Lindblad equation [1], which provides a dramatic speedup compared to conventional solutions. Especially in the few (N∼1−100) emitter case the solution is a major advance compared to existing techniques, while retaining the full quantum correlations and entanglement properties. Some applications of the developed method will be shown.
[1] M. Richter, M. Gegg, T.S. Theuerholz, A. Knorr, Phys. Rev. B 91: 035306 (2015)