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
More filters
Proceedings ArticleDOI
Arbitrary and Reconfigurable Optics – New Opportunities for Integrated Photonics
TL;DR: In this article, the authors show how to make universal linear components, beyond conventional optics, by integrating Mach-Zehnder meshes for arbitrary linear functions, which can be self-configured for any linear function.
Journal ArticleDOI
Mode-dispersion phase matching single photon source based on Thin-film lithium niobate
TL;DR: In this article , the authors proposed a novel thin-film lithium niobate parametric down-conversion single-photon source, grounded in mode dispersion phase matching theory, which achieved 3:8×107/s/mW.
Proceedings ArticleDOI
Integrated-optics circuits for validation of non-classicality
Andrea Crespi,Marco Bentivegna,Ioannis Pitsios,Davide Rusca,Davide Poderini,Gonzalo Carvacho,Vincenzo D'Ambrosio,Adán Cabello,Fabio Sciarrino,Roberto Osellame +9 more
TL;DR: In this article, it was suggested that even the non-classical power of quantum computing originates from contextuality, and it is highly relevant to find experimental evidence of this aspect in technological platforms that may be adopted in future quantum computing devices, such as integrated photonics.
Proceedings ArticleDOI
Scalability of Universal Nanophotonic Processing Circuits Based on Multi-Plane Light Conversion
TL;DR: Universal linear processing circuit based on multi-plane light conversion, comprising multiport directional couplers, is demonstrated to exhibit excellent fabrication tolerance even at increased scale, owing to its unique all-to-all unitary coupling at every layer.
Proceedings ArticleDOI
Quantum walks of self-collimated photons
TL;DR: In this paper, single-photon quantum walks in self-collimated photonic crystal chip were demonstrated, and the similarity between theoretical expectations and experimental results was higher than 0.98.
References
More filters
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.