Time-dependent transport of electrons through a photon cavity

Vidar Gudmundsson*, Olafur Jonasson, Chi Shung Tang, Hsi Sheng Goan, Andrei Manolescu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)


We use a non-Markovian master equation to describe the transport of Coulomb-interacting electrons through an electromagnetic cavity with one quantized photon mode. The central system is a finite-parabolic quantum wire that is coupled weakly to external parabolic quasi-one-dimensional leads at t=0. With a stepwise introduction of complexity to the description of the system and a corresponding stepwise truncation of the ensuing many-body spaces, we are able to describe the time-dependent transport of Coulomb-interacting electrons through a geometrically complex central system. We take the full electromagnetic interaction of electrons and cavity photons without resorting to the rotating-wave approximation or reduction of the electron states to two levels into account. We observe that the number of initial cavity photons and their polarizations can have important effects on the transport properties of the system. The quasiparticles formed in the central system have lifetimes limited by the coupling to the leads and radiation processes active on a much longer time scale.

Original languageEnglish
Article number075306
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number7
Publication statusPublished - 6 Feb 2012


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