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
Reads0
Chats0
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
Journal ArticleDOI
Hong-Ou-Mandel interference without beam splitters
TL;DR: In this paper, the authors proposed a new interferometric setup which displays a completely destructive generalized N-photon Hong-Ou-Mandel interference, which is intrinsically produced by the evolution of N photons in free space when emitted by N identical statistically independent single photon sources and measured by N detectors in the far field.
Journal ArticleDOI
Reconfigurable quantum phononic circuits via piezo-acoustomechanical interactions
TL;DR: In this article , a phase shifter waveguide is used to produce ± π phase shifts for GHz frequency phonons in 10s of μm with 10s volts applied.
Journal ArticleDOI
Broadband photon pair generation in green fluorescent proteins through spontaneous four-wave mixing
TL;DR: The results indicate that the generation of photon pairs in green fluorescent proteins is subject to less background noises than in other fluorophores, leading to a coincidence-to-accidental ratio ~145.
Journal ArticleDOI
Utilizing a Fully Optical and Reconfigurable PUF as a Quantum Authentication Mechanism.
H S. Jacinto,A. Matthew Smith +1 more
TL;DR: In this paper, the use of a physically unclonable function composed of a network of Mach-Zehnder interferometers for authentication tasks is described, which is completely reconfigurable, allowing for a large number of seemingly independent devices to be utilized.
Journal ArticleDOI
Characterization of optical quantum circuits using resonant phase shifts
Menno Poot,Hong X. Tang +1 more
TL;DR: In this paper, the phase shift induced by integrated optical resonators is used to determine the phase of an unbalanced Mach-Zehnder interferometer and the coupling ratio of its directional couplers.
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.