Entangled photon sources based on semiconductor quantum dots: The role of pure dephasing

Physical Review B - Condensed Matter and Materials Physics

Volumn 78, Issue 19, 2008, Pages

  Pfanner, Gernot ^a   Seliger, Marek ^a   Hohenester, Ulrich ^a  

^a UNIVERSITY OF GRAZ   (Austria)

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EID: 56349110812     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.78.195410     Document Type: Article

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36. This value is in reasonable agreement with the results of Akopian (Ref.) who reported a concurrence of 0.36±0.10 for a fine-structure splitting of 27 μeV and a filter width of about 25 μeV. With these values and the expressions given in the table, we obtain concurrences of 0.12 for γd =0 and 0.1 for γd =5 μeV. This too small value in comparison to the experiment might be due to our use of a Lorentzian filter instead of the more squarelike filter used in experiments. Decreasing the filter width we find an increase in the concurrence whose value, however, is rather insensitive to γd due to the small value of the concurrence, in accordance to the results shown in the inset of Fig. 3 (see the large flat areas of the concurrence for δ=20 μeV and larger values of δω).
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