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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Entanglement and Coherence in Classical and Quantum Optics
TL;DR: In this article, the concept of coherence and entanglement was explored for both the classical and quantum natures of light, and a method for reconstructing the coherency matrix of an electromagnetic beam with multiple degrees of freedom (DoF) was proposed.
Dissertation
Measurement-based quantum computation with qubit and continuous-variable systems
TL;DR: In this paper, Menicucci et al. proposed an extension of the measurement-based model for quantum computation in qubit and continuous-variable systems, where the intrinsic randomness of quantum computation can be harnessed when implementing them.
Book ChapterDOI
Quantum Processors in Silicon Photonics
Stefano Paesani,Anthony Laing +1 more
TL;DR: This chapter will review recent results in developing key building blocks for chip-scale photonic quantum devices and discuss the progress towards useful large-scale quantum computers in the silicon quantum photonics platform.
Journal ArticleDOI
High-speed thin-film lithium niobate quantum processor driven by a solid-state quantum emitter
Patrik I. Sund,Emma Lomonte,Stefano Paesani,Ying Wang,Jacques Carolan,Nikolai Bart,Andreas D. Wieck,Arne Ludwig,Leonardo Midolo,Wolfram H. P. Pernice,Peter Lodahl,Francesco Lenzini +11 more
TL;DR: In this article , the authors developed an integrated photonic platform based on thin-film lithium niobate and interface it with deterministic solid-state single-photon sources based on quantum dots in nanophotonic waveguides.
Journal ArticleDOI
Asymptotically fault-tolerant programmable photonics
TL;DR: In this paper , a 3-splitter MZI mesh for generic errors and a broadband MZI+Crossing design for correlated errors are proposed to overcome the scaling limitation of programmable coherent photonic circuits.
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.