Programmable frequency-bin quantum states in a nano-engineered silicon device

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.

References in corpus (3)

• Frequency-encoded photonic qubits for scalable quantum information processing
• High-dimensional frequency-bin entangled photons in an optical microresonator on a chip
• Complete frequency-bin Bell basis synthesizer

Cited by in corpus (16)

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• Information processing at the speed of light
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• Heralded generation of entanglement with photons
• On-chip frequency-bin quantum photonics
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• Deterministic entangling gates with nonlinear quantum photonic interferometers
• Integrated Photonic Programmable Random Matrix Generator with Minimal Active Components
• Quantum nonlocal modulation cancellation with distributed clocks
• Gottesman-Kitaev-Preskill encoding in continuous modal variables of single photons
• Generation of hyperentangled photon pairs in the time and frequency domain on a silicon photonic chip
• Entanglement of photonic modes from a continuously driven two-level system
• Surpassing the loss-noise robustness trade-off in quantum key distribution
• Time-resolved certification of frequency-bin entanglement over multi-mode channels
• Resource state generation for a multispin register in a hybrid matter-photon quantum information processor
• High-dimensional quantum communication with scalable photonic entanglement in time and frequency