Quantum-tomography of entangled photon pairs by quantum-dot cascade decay

Abstract

We compute the concurrence of the polarization-entangled photon pairs generated by the biexciton cascade decay of a semiconductor quantum dot. We show how a cavity-induced increase of the photon rate emission reduces the detrimental effect of the dot dephasing and of the excitonic fine structure. However, strong dot-cavity couplings and finite detection efficiencies are shown to reduce the relevance of the desired cascade decay with respect to that of competing processes. This affects the merits of the entangled photon-pair source, beyond what estimated by the quantum-tomography.

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Cited by in corpus (29)

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• A quantum dot single-photon source with on-the-fly all-optical polarization control and timed emission
• Mode identification of high-quality-factor single-defect nanocavities in quantum dot-embedded photonic crystals
• Formation dynamics of an entangled photon pair -- a temperature dependent analysis
• Phonon-induced enhancement of photon entanglement in quantum dot-cavity systems
• Polarization-entangled twin photons from two-photon quantum-dot emission
• Two-Photon Excitation Sets Limit to Entangled Photon Pair Generation from Quantum Emitters
• Comparison of different concurrences characterizing photon-pairs generated in the biexciton cascade in quantum dots coupled to microcavities
• Entangled photon pairs from a quantum dot cascade decay: the effect of time-reordering
• From strong to weak temperature dependence of the two-photon entanglement resulting from the biexciton cascade inside a cavity
• Bell inequalities and density matrix for polarization entangled photons out of a two-photon cascade in a single quantum dot
• Generation method of a photonic NOON state with quantum dots in coupled nanocavities
• Entanglement swapping with energy-polarization entangled photons from quantum dot cascade decay
• Distilling entanglement from cascades with partial "Which Path" ambiguity
• Time evolution of cascade decay
• Entanglement transfer from electrons to photons in quantum dots: An open quantum system approach
• Two-photon excitation with finite pulses unlocks pure dephasing-induced degradation of entangled photons emitted by quantum dots
• Entanglement Dynamics of Molecular Exciton States in Coupled Quantum Dots
• Electrostatic control of quantum dot entanglement induced by coupling to external reservoirs
• Different types of photon entanglement from a constantly driven quantum emitter inside a cavity
• Entanglement dynamics of photon pairs emitted from quantum dot
• Nonclassical Correlation of Polarization Entangled Photons in a Biexciton-Exciton Cascade
• Time-dependent switching of the photon entanglement type using a driven quantum emitter-cavity system
• Dramatic impact of pumping mechanism on photon entanglement in microcavity
• Phonon-induced transition between entangled and nonentangled photon emission in constantly driven quantum-dot--cavity systems
• Entangled photons from composite cascade emitters
• All-optical non-demolition measurement of single-hole spin in a quantum-dot molecule