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

Abstract

We 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.

arXiv comment5 pages, 2 figures. v2: Extended scheme, revised version. v3: Minor additions and extended title, published version

References in corpus (17)

• Andreev-Tunneling, Coulomb Blockade, and Resonant Transport of Non-Local Spin-Entangled Electrons
• Noise of Entangled Electrons: Bunching and Antibunching
• Polarization-Correlated Photon Pairs from a Single Quantum Dot
• Spin-entangled currents created by a triple quantum dot
• Quantum entanglement in carbon nanotubes
• Superconductor coupled to two Luttinger liquids as an entangler for electron spins
• Rashba spin-orbit interaction and shot noise for spin-polarized and entangled electrons
• Photon Correlation Spectroscopy of a Single Quantum Dot
• An entangled two photon source using biexciton emission of an asymmetric quantum dot in a cavity
• Biexcitons in Coupled Quantum Dots as a Source of Entangled Photons
• Exciton spin relaxation in single semiconductor quantum dots
• Single Carbon Nanotube--Superconductor Entangler: noise correlations and EPR states
• Dynamical Coulomb blockade and spin-entangled electrons
• Accuracy of circular polarization as a measure of spin polarization in quantum dot qubits
• Lower bound for electron spin entanglement from beamsplitter current correlations
• Coulomb scattering in a 2D interacting electron gas and production of EPR pairs
• Efficient electron spin detection with positively charged quantum dots

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• Intrinsic upper bound on two-qubit polarization entanglement predetermined by pump polarization correlations in parametric down-conversion
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• Entanglement transfer from electrons to photons in quantum dots: An open quantum system approach
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