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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Journal ArticleDOI
Experimental quantum stochastic walks simulating associative memory of Hopfield neural networks
Hao Tang,Hao Tang,Zhen Feng,Zhen Feng,Ying-Han Wang,Peng-Cheng Lai,Chao-Yue Wang,Zhuo-Yang Ye,Cheng-Kai Wang,Zi-Yu Shi,Zi-Yu Shi,Tian-Yu Wang,Yuan Chen,Yuan Chen,Yuan Chen,Jun Gao,Jun Gao,Jun Gao,Xian-Min Jin,Xian-Min Jin +19 more
TL;DR: In this paper, a quantum stochastic walk is used to simulate associative memory in Hopfield neural networks, and a 3D photonic quantum chip is constructed to simulate the associative memories.
Journal ArticleDOI
Drive-noise tolerant optical switching inspired by composite pulses
TL;DR: Inspired by the Mach-Zehnder lattice switching devices and techniques from the field of Nuclear Magnetic Resonance known as composite pulses, switches are presented which offer protection against drive-noise in both the on and off state of the switch for both the phase and intensity information encoded in the switched optical mode.
Journal ArticleDOI
High-dimensional quantum encoding via photon-subtracted squeezed states
TL;DR: It is proved that this high-dimensional quantum encoding based on coherent mode-dependent single-photon subtraction from multimode squeezed states can be used to calculate vector distances, a pivotal primitive in various quantum machine learning algorithms.
Journal ArticleDOI
Strain tunable single-photon source based on a quantum dot-micropillar system
Magdalena Moczała-Dusanowska,Ł. Dusanowski,Stefan Gerhardt,Yu-Ming He,Marcus Reindl,Armando Rastelli,Rinaldo Trotta,Rinaldo Trotta,Niels Gregersen,Sven Höfling,Sven Höfling,Christian Schneider +11 more
TL;DR: In this article, a single-photon source based on an InAs quantum dot embedded in a micropillar resonator is presented, which is frequency tunable via externally-applied stress.
Posted Content
Photonic Recurrent Ising Sampler
Charles Roques-Carmes,Yichen Shen,Cristian Zanoci,Mihika Prabhu,Fadi Atieh,Li Jing,Tena Dubček,Vladimir Ceperic,John D. Joannopoulos,Dirk Englund,Marin Soljacic +10 more
TL;DR: The Photonic Recurrent Ising Sampler (PRIS), an algorithm tailored for photonic parallel networks, that can sample distributions of arbitrary Ising problems, is presented.
References
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Book
Quantum Computation and Quantum Information
TL;DR: In this article, the quantum Fourier transform and its application in quantum information theory is discussed, and distance measures for quantum information are defined. And quantum error-correction and entropy and information are discussed.
Quantum Computation and Quantum Information
TL;DR: This chapter discusses quantum information theory, public-key cryptography and the RSA cryptosystem, and the proof of Lieb's theorem.
Journal ArticleDOI
A scheme for efficient quantum computation with linear optics.
TL;DR: It is shown that efficient quantum computation is possible using only beam splitters, phase shifters, single photon sources and photo-detectors and are robust against errors from photon loss and detector inefficiency.
Journal ArticleDOI
Measurement of subpicosecond time intervals between two photons by interference.
TL;DR: A fourth-order interference technique has been used to measure the time intervals between two photons, and by implication the length of the photon wave packet, produced in the process of parametric down-conversion.