On-chip quantum interference between independent lithium niobate-on-insulator photon-pair sources
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2024
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Working Paper
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Abstract
Generating and interfering non-classical states of light is fundamental to optical quantum in formation science and technology. Quantum photonic integrated circuits provide one pathway to wards scalability by combining nonlinear sources of non-classical light and programmable circuits in centimeter-scale devices. The key requirements for quantum applications include efficient genera tion of indistinguishable photon-pairs and high-visibility programmable quantum interference. Here, we demonstrate a lithium niobate-on-insulator (LNOI) integrated photonic circuit that generates a two-photon path-entangled state, and a programmable interferometer for quantum interference. We generate entangled photons with ∼ 2.3 × 108 pairs/s/mW brightness and perform quantum interference experiments on the chip with 96.8 ± 3.6 % visibility. LNOI is an emerging photonics technology that has revolutionized high-speed modulators and efficient frequency conversion. Our results provide a path towards large-scale integrated quantum photonics including efficient photon pair generation and programmable circuits for applications such as boson sampling and quantum communications.
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Cornell University
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v1
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09531 - Grange, Rachel / Grange, Rachel
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208707 - Lithium niobate-on-insulator photonics for linear optical quantum computing (SNF)
194693 - Maturing and scaling up fabrication of lithium-niobate-based integrated photonic sensors - LINIOS (SNF)
714837 - Second-Order Nano-Oxides for Enhanced Nonlinear Photonics (EC)
194693 - Maturing and scaling up fabrication of lithium-niobate-based integrated photonic sensors - LINIOS (SNF)
714837 - Second-Order Nano-Oxides for Enhanced Nonlinear Photonics (EC)
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Is previous version of: https://doi.org/10.3929/ethz-b-000742390