Formation dynamics of an entangled photon pair: A temperature-dependent analysis

Phys. Rev. B 81, 195319 – Published 26 May 2010 https://doi.org/10.1103/PhysRevB.81.195319 Abstract We theoretically study the polarization entanglement of photons generated by the biexciton cascade in a GaAs/InAs semiconductor quantum dot (QD) located in a nanocavity. A detailed analysis of the complex interplay between photon and carrier coherences and phonons which occurs during the cascade allows us to clearly identify the conditions under which entanglement is generated and destroyed. A quantum state tomography is evaluated for varying exciton fine-structure splittings. Also, by constructing an effective multiphonon Hamiltonian which couples the continuum of the QD-embedding wetting layer states to the...

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