Complete and Partial Loss of Entanglement Due to a Phonon-Assisted Dephasing Process
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 study the evolution of entanglement between two excitons in a double quantum dot system coupled to a super-Ohmic reservoir. As expected entanglement is more fragile than local coherence, but, surprisingly, for a set of pure states disentanglement can be complete in a finite time under conditions that lead to the usual partial pure-dephasing.
DOI: 10.12693/APhysPolA.110.331
PACS numbers: 03.67.Lx, 03.65.Yz, 63.20.Kr