Wave-Shape-Tolerant Photonic Quantum Gates

authored by: Ihar Babushkin, Ayhan Demircan, Michael Kues, Uwe Morgner
Abstract: Photons, acting as “flying qubits” in propagation geometries such as waveguides, appear unavoidably in the form of wave packets (pulses). The actual shape of the photonic wave packet as well as possible temporal and spectral correlations between the photons play a critical role in successful scalable computation. Currently, unentangled indistinguishable photons are considered a suitable resource for scalable photonic circuits. Here we show that using so-called coherent photon conversion, it is possible to construct flying-qubit gates which are not only insensitive to wave shapes of the photons and temporal and spectral correlations between them but which also fully preserve these wave shapes and correlations upon the processing. This allows the use of photons with correlations and purity in a very broad range for a scalable computation. Moreover, such gates can process entangled photonic wave packets even more effectively than unentangled ones.
Organisation(s): Institute of Quantum Optics
PhoenixD: Photonics, Optics, and Engineering - Innovation Across Disciplines
Institute of Photonics
QuantumFrontiers
External Organisation(s): Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy im Forschungsbund Berlin e.V. (MBI)
Type: Article
Journal: Physical Review Letters
Volume: 128
ISSN: 0031-9007
Publication date: 04.03.2022
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Physics and Astronomy(all)
Electronic version(s): https://doi.org/10.48550/arXiv.2105.13814 (Access: Open)
https://doi.org/10.1103/PhysRevLett.128.090502 (Access: Closed)

BibTeX

@article{17e4c32b63fd4643b5ff026004c77d12,
title = "Wave-Shape-Tolerant Photonic Quantum Gates",
abstract = "Photons, acting as “flying qubits” in propagation geometries such as waveguides, appear unavoidably in the form of wave packets (pulses). The actual shape of the photonic wave packet as well as possible temporal and spectral correlations between the photons play a critical role in successful scalable computation. Currently, unentangled indistinguishable photons are considered a suitable resource for scalable photonic circuits. Here we show that using so-called coherent photon conversion, it is possible to construct flying-qubit gates which are not only insensitive to wave shapes of the photons and temporal and spectral correlations between them but which also fully preserve these wave shapes and correlations upon the processing. This allows the use of photons with correlations and purity in a very broad range for a scalable computation. Moreover, such gates can process entangled photonic wave packets even more effectively than unentangled ones.",
author = "Ihar Babushkin and Ayhan Demircan and Michael Kues and Uwe Morgner",
note = "Funding Information: I. B. and U. M. thank Deutsche Forschungsgemeinschaft (DFG, German Research Foundation), Projects No. BA 4156/4-2 and No. MO 850-19/2 for support. I. B., A. D., M. K., and U. M. acknowledge support from Germany{\textquoteright}s Excellence Strategy within the Cluster of Excellence EXC 2122 PhoenixD (Project ID No. 390833453) and Germany{\textquoteright}s Excellence Strategy EXC-2123 QuantumFrontiers (Project ID No. 390837967). M. K. acknowledges support from the German Ministry of Education and Research (PQuMAL project).",
year = "2022",
month = mar,
day = "4",
doi = "10.48550/arXiv.2105.13814",
language = "English",
volume = "128",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "9",
}