Entanglement transfer from electron spins to photons in spin light-emitting diodes containing quantum dots

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dc.creatorCerletti, Veronica
dc.creatorGywat, Oliver
dc.creatorLoss, Daniel
dc.date2004-11-09
dc.date2005-09-26
dc.date.accessioned2026-07-07T06:19:15Z
dc.date.available2026-07-07T06:19:15Z
dc.descriptionWe show that electron recombination using positively charged excitons in single quantum dots provides an efficient method to transfer entanglement from electron spins onto photon polarizations. We propose a scheme for the production of entangled four-photon states of GHZ type. From the GHZ state, two fully entangled photons can be obtained by a measurement of two photons in the linear polarization basis, even for quantum dots with observable fine structure splitting for neutral excitons and significant exciton spin decoherence. Because of the interplay of quantum mechanical selection rules and interference, maximally entangled electron pairs are converted into maximally entangled photon pairs with unity fidelity for a continuous set of observation directions. We describe the dynamics of the conversion process using a master-equation approach and show that the implementation of our scheme is feasible with current experimental techniques.
dc.description5 pages, 2 figures. v2: Extended scheme, revised version. v3: Minor additions and extended title, published version
dc.identifierhttps://arxiv.org/abs/cond-mat/0411235
dc.identifierhttp://arxiv.org/abs/cond-mat/0411235
dc.identifierPhys. Rev. B 72, 115316 (2005)
dc.identifierdoi:10.1103/PhysRevB.72.115316
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/95009
dc.subjectMesoscale and Nanoscale Physics
dc.subjectQuantum Physics
dc.titleEntanglement transfer from electron spins to photons in spin light-emitting diodes containing quantum dots
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