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
Proceedings ArticleDOI
Modal, Truly Counterfactual Communication with On-Chip Demonstration Proposal
TL;DR: This work formalizes Salih et al's Counterfactual Communication Protocol (arXiv2018), which allows it not only to be used in with other modes than polarization, but also for interesting extensions (e.g. sending superpositions from Bob to Alice).
Proceedings ArticleDOI
Scalable On-Chip Single-Photon Cross-Bar Switching
Xiaoxi Wang,Shayan Mookherjea +1 more
TL;DR: In this paper , single-photon measurements of an electro-optic silicon-photonic add-drop microresonator demonstrate entanglement-preserving voltage-driven switching with fast 10%-90% transition times [<50 ps], low-loss transmission [94% (90%) bar (cross-state] and high quantum twophoton interference visibility [~99%] at 1550 nm.
Book ChapterDOI
Integrated quantum photonic circuits made from diamond
TL;DR: In this article, the main components required for a diamond-based integrated quantum photonic architecture, namely single-photon emitters, reconfigurable waveguide devices, and waveguide integrated singlephoton detectors, are discussed.
Proceedings ArticleDOI
Demonstration of 8-Step Single-Photon Quantum Walk using 32 × 32 Reconfigurable Silicon Photonics Switch
TL;DR: In this paper, a reconfigurable quantum-walk circuit was implemented on a 32×32 silicon photonics switch system, which exhibited long-term stability over 45 hours with clear single-photon interference for 10-nm-bandwidth heralded single photons.
Posted Content
A hybrid waveguide scheme for silicon-based quantum photonic circuits with quantum light sources
TL;DR: In this paper, a hybrid silicon waveguide scheme was proposed to avoid the impact of noise photons induced by pump lights in application scenarios of quantum photonic circuits with quantum light sources, which is composed of strip waveguide and shallow-ridge waveguide structures.
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.