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1.
Opt Lett ; 48(4): 867, 2023 Feb 15.
Article in English | MEDLINE | ID: mdl-36790961

ABSTRACT

This publisher's note contains corrections to Opt. Lett.47, 6201 (2022)10.1364/OL.471241.

2.
Nat Commun ; 14(1): 176, 2023 Jan 12.
Article in English | MEDLINE | ID: mdl-36635283

ABSTRACT

Photonic qubits should be controllable on-chip and noise-tolerant when transmitted over optical networks for practical applications. Furthermore, qubit sources should be programmable and have high brightness to be useful for quantum algorithms and grant resilience to losses. However, widespread encoding schemes only combine at most two of these properties. Here, we overcome this hurdle by demonstrating a programmable silicon nano-photonic chip generating frequency-bin entangled photons, an encoding scheme compatible with long-range transmission over optical links. The emitted quantum states can be manipulated using existing telecommunication components, including active devices that can be integrated in silicon photonics. As a demonstration, we show our chip can be programmed to generate the four computational basis states, and the four maximally-entangled Bell states, of a two-qubits system. Our device combines all the key properties of on-chip state reconfigurability and dense integration, while ensuring high brightness, fidelity, and purity.

3.
Opt Lett ; 47(23): 6201-6204, 2022 Dec 01.
Article in English | MEDLINE | ID: mdl-37219207

ABSTRACT

We demonstrate an integrated source of frequency-entangled photon pairs on a silicon photonics chip. The emitter has a coincidence-to-accidental ratio exceeding 103. We prove entanglement by showing two-photon frequency interference with a visibility of 94.6% ± 1.1%. This result opens the possibility of on-chip integration of frequency-bin sources with modulators and the other active and passive devices available in the silicon photonics platform.

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