Phonon-Induced Dephasing in Quantum Dots - Interpretation in Terms of Information Leakage

K. Roszak, P. Machnikowski and L. Jacak Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

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Received: 17 06 2006;

We show that the phonon-induced pure dephasing of excitons in quantum dots can be interpreted in terms of information leakage from the carrier subsystem to the lattice environment. We derive a quantitative relation between the coherence of the system, as manifested by the amplitude of the coherent optical polarization, and the amount of available which path information on the system state, quantified by the distinguishability of states.

DOI: 10.12693/APhysPolA.110.325 PACS numbers: 78.67.Hc, 03.65.Ta, 63.20.Kr