On-chip quantum interference between independent lithium niobate-on-insulator photon-pair sources
- URL: http://arxiv.org/abs/2404.08378v1
- Date: Fri, 12 Apr 2024 10:24:43 GMT
- Title: On-chip quantum interference between independent lithium niobate-on-insulator photon-pair sources
- Authors: Robert J. Chapman, Tristan Kuttner, Jost Kellner, Alessandra Sabatti, Andreas Maeder, Giovanni Finco, Fabian Kaufmann, Rachel Grange,
- Abstract summary: A lithium niobate-on-insulator (LNOI) integrated photonic circuit generates a two-photon path-entangled state, and a programmable interferometer for quantum interference.
We generate entangled photons with $sim2.3times108$ pairs/s/mW brightness and perform quantum interference experiments on the chip with $96.8pm3.6%$ visibility.
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.
- Score: 35.310629519009204
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Generating and interfering non-classical states of light is fundamental to optical quantum information science and technology. Quantum photonic integrated circuits provide one pathway towards scalability by combining nonlinear sources of non-classical light and programmable circuits in centimeter-scale devices. The key requirements for quantum applications include efficient generation 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 $\sim2.3\times10^8$ pairs/s/mW brightness and perform quantum interference experiments on the chip with $96.8\pm3.6\%$ 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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