Eliminating temporal correlation in quantum-dot entangled photon source by quantum interference
Abstract
Semiconductor quantum dots, as promising solid-state platform, have exhibited deterministic photon pair generation with high polarization entanglement f idelity for quantum information applications. However, due to temporal correlation from inherently cascaded emission, photon indistinguishability is limited, which restricts their potential scalability to multi-photon experiments. Here, by utilizing quantum interferences to decouple polarization entanglement from temporal correlation, we improve multi-photon entanglement f idelity from (58.7 2.2)\% to (75.5 2.0)\%. Our work paves the way to realize scalable and high-quality multi-photon states from quantum dots.
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