Universal linear optics
Jacques Carolan,Chris Harrold,Chris Sparrow,Chris Sparrow,Enrique Martin-Lopez,Nicholas Russell,Joshua W. Silverstone,Peter Shadbolt,Nobuyuki Matsuda,Manabu Oguma,Mikitaka Itoh,Graham D. Marshall,Mark G. Thompson,Jonathan C. F. Matthews,Toshikazu Hashimoto,Jeremy L. O'Brien,Anthony Laing +16 more
TLDR
In this paper, a sixmode universal system consisting of a cascade of 15 Mach-Zehnder interferometers with 30 thermo-optic phase shifters integrated into a single photonic chip was demonstrated.Abstract:
Linear optics underpins fundamental tests of quantum mechanics and quantum technologies. We demonstrate a single reprogrammable optical circuit that is sufficient to implement all possible linear optical protocols up to the size of that circuit. Our six-mode universal system consists of a cascade of 15 Mach-Zehnder interferometers with 30 thermo-optic phase shifters integrated into a single photonic chip that is electrically and optically interfaced for arbitrary setting of all phase shifters, input of up to six photons, and their measurement with a 12-single-photon detector system. We programmed this system to implement heralded quantum logic and entangling gates, boson sampling with verification tests, and six-dimensional complex Hadamards. We implemented 100 Haar random unitaries with an average fidelity of 0.999 ± 0.001. Our system can be rapidly reprogrammed to implement these and any other linear optical protocol, pointing the way to applications across fundamental science and quantum technologies.read more
Citations
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Patent
Real-number photonic encoding
TL;DR: Optical encoders for encoding signed, real numbers using optical fields are described in this article, where the optical fields may be detected using coherent detection, without the need for independent phase and amplitude control.
Proceedings ArticleDOI
Photonic arbitrary linear transformations in the frequency synthetic dimension
TL;DR: This work presents a photonic architecture of time-modulated micro-ring resonators with tunable couplings between frequency modes to achieve arbitrary frequency-dimension linear transformations.
Journal ArticleDOI
Quantum Fredkin and Toffoli gates on a versatile programmable silicon photonic chip
Yuan Li,Ling-ling Wan,Hui Zhang,Huihui Zhu,Yuzhi Shi,Lip Ket Chin,Xiao-Qi Zhou,Leong Chuan Kwek,Ai Qun Liu +8 more
TL;DR: In this paper , a proof-of-principle demonstration of three-qubit Fredkin and Toffoli gates on a programmable quantum photonic chip is presented.
Journal ArticleDOI
Taking tomographic measurements for photonic qubits 88 ns before they are created
Zhibo Hou,Qi Yin,Chao Zhang,Han-Sen Zhong,Guo-Yong Xiang,Chuan-Feng Li,Guang-Can Guo,Geoff J. Pryde,Anthony Laing +8 more
TL;DR: In this article, a variant of the quantum teleportation protocol is used as a channel between two instants in time, allowing measurements for polarisation states of photons to be implemented 88 ns before they are created.
Posted Content
Quantum Advantage with Timestamp Membosonsampling
Jun Gao,Xiao-Wei Wang,Wen-Hao Zhou,Zhi-Qiang Jiao,Ruo-Jing Ren,Yu-Xuan Fu,Lu-Feng Qiao,Xiao-Yun Xu,Chao-Ni Zhang,Xiao-Ling Pang,Hang Li,Yao Wang,Xian-Min Jin +12 more
TL;DR: This work exhibits an integrated and cost-efficient shortcut stepping into the "quantum advantage" regime in a photonic system far beyond previous scenarios, and provide a scalable and controllable platform for quantum information processing.
References
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Book
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