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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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
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Infinitely Scalable Multiport Interferometers.
TL;DR: In this paper, a 3-splitter MZI for generic errors and a broadband MZI+Crossing design for correlated errors are proposed. But the proposed architectures support progressive self-configuration, are more compact than previous MZI-doubling schemes, and do not require additional phase shifters.
Proceedings ArticleDOI
Silicon-based optoelectronics for general-purpose matrix computation: a review
TL;DR: In this paper , the authors reviewed the recent progress in photonic matrix computation, including matrixvector multiplication, convolution, and multiply-accumulate operations in artificial neural networks, quantum information processing, combinatorial optimization, and compressed sensing, with particular attention paid to energy consumption.
Journal ArticleDOI
Matrix optimization on universal unitary photonic devices
TL;DR: In this article, the gradient-based optimization of random unitary matrices on universal photonic devices composed of imperfect tunable interferometers is simulated and shown to improve convergence speed.
Journal ArticleDOI
Dynamical Behavior of Two Interacting Double Quantum Dots in 2D Materials for Feasibility of Controlled-NOT Operation
Aniwat Kesorn,Rutchapon Hunkao,K. Tivakornsasithorn,Asawin Sinsarp,Worasak Sukkabot,Sujin Suwanna +5 more
TL;DR: In this paper , two interacting double quantum dots (DQDs) are modeled by the heterostructure of two-dimensional (2D) MoS2 having 1T-phase embedded in 2H-phase with the aim to investigate the feasibility of controlled-NOT (CNOT) gate operation with the Coulomb interaction.
Journal ArticleDOI
Modeling of integrated optical quantum search algorithm
E.O. Samsonov,F.D. Kiselev,S.A. Chivilikhin,V.I. Egorov,D.N. Kirichenko,Yu.A. Adam,R.A. Kabiev,A. V. Gleim +7 more
TL;DR: A quantum search algorithm model, suitable for integration into a linear optical chip, is presented, and error impact caused by two-qubit operator implementation and directional coupler manufacture imperfection on the algorithm output is studied.
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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.