Maximally entangled and gigahertz-clocked on-demand photon pair source

Article

关键词: QUANTUM;    STATE;    GENERATION;   

DOI  :  10.1103/PhysRevB.103.075413

来源: SCIE

【 摘 要 】

We present a 1 GHz-clocked, maximally entangled and on-demand photon pair source based on droplet etched GaAs quantum dots using two-photon excitation. By employing these GaP microlens-enhanced devices in conjunction with their substantial brightness, raw entanglement fidelities of up to 0.95 +/- 0.01 and postselected photon indistinguishabilities of up to 0.93 +/- 0.01, the suitability for quantum repeater based long range quantum entanglement distribution schemes is shown. Comprehensive investigations of a complete set of polarization selective two-photon correlations facilitate an innovative method to determine the extraction and excitation efficiencies directly, as opposed to commonly employed indirect techniques. Additionally, time-resolved analysis of Hong-Ou-Mandel interference traces reveal an alternative approach to the investigation of pure photon dephasing.

【 授权许可】

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