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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Posted Content
Classifying quantum circuits with qubit functional configurations.
Zixuan Hu,Sabre Kais +1 more
TL;DR: In this article, the authors propose a theory of classifying quantum circuits with qubit functional configurations, which characterize important properties of the corresponding quantum circuits such as the circuit complexity, providing systematic knowledge of large collections of quantum circuits.
Journal ArticleDOI
An electro-optic full adder designed with coupled Si ring resonators for highly dense integration
Takanori Sato,Akira Enokihara +1 more
TL;DR: In this paper , the authors proposed a new design of an electro-optic full adder by using coupled Si microring resonators for highly dense integration, which reduced the optical waveguide footprint to approximately 60 μm × 100 μm per bit.
Proceedings ArticleDOI
Unitary linear optical transformations in a reconfigurable platform
Aldo C. Martínez,Siwei Luo,Jordan T. R. Page,Li Liu,Lambert Giner,Raphael A. Abrahao,Jeff S. Lundeen +6 more
TL;DR: In this article, a discrete set of phase masks and free space propagation is used to transform optical spatial modes on a beam array, and general transformations are demonstrated on a single beam array.
Proceedings ArticleDOI
Analysis of an Analog Optical Neural Network
TL;DR: A single layer analog optical neural network based on a 44 reconfigurable optical processor is analyzed through simulation and yields a final accuracy of 95.6% using a stochastic optimization algorithm and a synthetic dataset.
Proceedings ArticleDOI
A reconfigurable modular system for on-chip quantum optics
Paolo L. Mennea,William R. Clements,Matthew T. Posner,Rex H. S. Bannerman,Devin H. Smith,Jelmer J. Renema,James C. Gates,W. S. Kolthammer,I. A. Walmsley,Pete Smith +9 more
TL;DR: Fabrication imperfections create a number of difficulties in moving to more complex setups since the classical performance of the network must be characterised before an analysis of its quantum properties can be carried out, and this process becomes greatly more challenging as the circuit complexity grows.
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.