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
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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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Quantum computational advantage using photons
Han-Sen Zhong,Hui Wang,Yu-Hao Deng,Ming-Cheng Chen,Li-Chao Peng,Yi-Han Luo,Jian Qin,Dian Wu,Xing Ding,Yi Hu,Peng Hu,Xiaoyan Yang,Weijun Zhang,Hao Li,Yuxuan Li,Xiao Jiang,Lin Gan,Guangwen Yang,Lixing You,Zhen Wang,Li Li,Nai-Le Liu,Chao-Yang Lu,Jian-Wei Pan +23 more
TL;DR: In this paper, the authors proposed to use quantum computers to perform certain tasks that are believed to be intractable to classical computers, such as Boson sampling, which is considered a strong candidate to demonstrate the capabilities of quantum computers.
Journal ArticleDOI
High-performance semiconductor quantum-dot single-photon sources.
TL;DR: The latest quantum dot-based single-Photon sources are edging closer to the ideal single-photon source, and have opened new possibilities for quantum technologies.
Journal ArticleDOI
Quantum computational supremacy
Aram W. Harrow,Ashley Montanaro +1 more
TL;DR: This work presents the leading proposals to achieve quantum supremacy, and discusses how to reliably compare the power of a classical computer to thePower of a quantum computer.
Journal ArticleDOI
Quantum computational advantage using photons
Han-Sen Zhong,Hui Wang,Yu-Hao Deng,Ming-Cheng Chen,Li-Chao Peng,Yi-Han Luo,Jian Qin,Dian Wu,Xing Ding,Yi Hu,Peng Hu,Xiaoyan Yang,Weijun Zhang,Hao Li,Yuxuan Li,Xiao Jiang,Lin Gan,Guangwen Yang,Lixing You,Zhen Wang,Li Li,Nai-Le Liu,Chao-Yang Lu,Jian-Wei Pan +23 more
TL;DR: Gaussian boson sampling was performed by sending 50 indistinguishable single-mode squeezed states into a 100-mode ultralow-loss interferometer with full connectivity and random matrix and sampling the output using 100 high-efficiency single-photon detectors, and the obtained samples were validated against plausible hypotheses exploiting thermal states, distinguishable photons, and uniform distribution.
Journal ArticleDOI
Integrated photonic quantum technologies
TL;DR: In this paper, the authors summarized the advances in integrated photonic quantum technologies and its demonstrated applications, including quantum communications, simulations of quantum chemical and physical systems, sampling algorithms, and linear-optic quantum information processing.
References
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Generating, manipulating and measuring entanglement and mixture with a reconfigurable photonic circuit
Peter Shadbolt,Maria Rodas Verde,Alberto Peruzzo,Alberto Politi,Anthony Laing,Mirko Lobino,Jonathan C. F. Matthews,Mark G. Thompson,Jeremy L. O'Brien +8 more
TL;DR: In this article, a reconfigurable integrated quantum photonic circuit consisting of a two-qubit entangling gate, several Hadamard-like gates and eight variable phase shifters is presented.
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A Concise Guide to Complex Hadamard Matrices
TL;DR: Basic properties of complex Hadamard matrices are reviewed and a catalogue of inequivalent cases known for the dimensions N = 2, 16, 12, 14 and 16 are presented.
Journal ArticleDOI
Self-configuring universal linear optical component
TL;DR: It is shown how to design an optical device that can perform any linear function or coupling between inputs and outputs, and that other linear operations, including frequency and time mappings, are possible in principle, even if very challenging in practice, thus proving there is at least one constructive design for any conceivable linear optical component.
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Self-configuring universal linear optical component [Invited]
TL;DR: In this paper, the authors propose a self-configuration method for linear optical components, which can perform any linear function or coupling between inputs and outputs, without global feedback or multiparameter optimization.
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Realization of a photonic controlled-NOT gate sufficient for quantum computation.
TL;DR: The experiment achieves the first experimental demonstration of a quantum controlled-NOT gate for different photons, which is classically feed forwardable and of significant importance for quantum information processing with linear optics.