Programmable frequency-bin quantum states in a nano-engineered silicon device.
Programmable frequency-bin quantum states in a nano-engineered silicon device.
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DOI：
10.1038/s41467-022-35773-6
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发表时间：
2023-01-12
影响因子：
16.6
通讯作者：
Bajoni, Daniele
中科院分区：
文献类型：
--
作者：
Clementi, Marco;Sabattoli, Federico Andrea;Borghi, Massimo;Gianini, Linda;Tagliavacche, Noemi;El Dirani, Houssein;Youssef, Laurene;Bergamasco, Nicola;Petit-Etienne, Camille;Pargon, Erwine;Sipe, J. E.;Liscidini, Marco;Sciancalepore, Corrado;Galli, Matteo;Bajoni, Daniele
在实际应用中，光子量子位元必须具有片上可控和耐噪声的特性。此外，量子比特源应该是可编程的，具有高亮度，对量子算法有用，并具有抗损失的弹性。然而，广泛的编码方案最多只能结合这两个属性。在这里，我们通过展示一种可编程硅纳米光子芯片来克服这一障碍，该芯片产生频率bin纠缠光子，这是一种兼容于光链路上远程传输的编码方案。发射的量子态可以使用现有的电信组件来操纵，包括可以集成在硅光子学中的有源器件。作为演示，我们展示了我们的芯片可以被编程来产生四个计算基态，以及四个最大纠缠的贝尔态，一个双量子位系统。我们的器件结合了片上状态可重构性和密集集成的所有关键特性，同时确保了高亮度，保真度和纯度。频率bin量子比特获得了时间bin和双轨编码的最佳性能，但需要外部调制器和脉冲整形器来构建任意状态。在这里，作者直接在芯片上工作，通过控制在多个相干泵浦环形谐振器中产生的双光子振幅的干扰。
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. Frequency-bin qubits get the best of time-bin and dual-rail encodings, but require external modulators and pulse shapers to build arbitrary states. Here, instead, the authors work directly on-chip by controlling the interference of biphoton amplitudes generated in multiple, coherently-pumped ring resonators.
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影响因子：
3.6
作者：
Azzini, Stefano;Grassani, Davide;Bajoni, Daniele
通讯作者：
Bajoni, Daniele
影响因子：
2.9
作者：
James, DFV;Kwiat, PG;White, AG
通讯作者：
White, AG
影响因子：
64.8
作者：
Kues, Michael;Reimer, Christian;Morandotti, Roberto
通讯作者：
Morandotti, Roberto
影响因子：
3.8
作者：
Takesue, Hiroki;Noguchi, Yuita
通讯作者：
Noguchi, Yuita
影响因子：
8.6
作者：
FRANSON, JD
通讯作者：
FRANSON, JD