Non-markovian model of photon-assisted dephasing by electron-phonon interactions in a coupled quantum-dot-cavity system

P. Kaer*, T. R. Nielsen, P. Lodahl, A. P. Jauho, J. Mørk

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

88 Citations (Scopus)

Abstract

We investigate the influence of electron-phonon interactions on the dynamical properties of a quantum-dot-cavity QED system. We show that non-Markovian effects in the phonon reservoir lead to strong changes in the dynamics, arising from photon-assisted dephasing processes, not present in Markovian treatments. A pronounced consequence is the emergence of a phonon induced spectral asymmetry when detuning the cavity from the quantum-dot resonance. The asymmetry can only be explained when considering the polaritonic quasiparticle nature of the quantum-dot-cavity system. Furthermore, a temperature induced reduction of the light-matter coupling strength is found to be relevant in interpreting experimental data, especially in the strong coupling regime.

Original languageEnglish
Article number157401
JournalPhysical Review Letters
Volume104
Issue number15
DOIs
Publication statusPublished - 13 Apr 2010
MoE publication typeA1 Journal article-refereed

Keywords

  • Cavity QED
  • Non-Markovian dephasing
  • Photon-assisted processes

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