Quantum Nondemolition Gate Operations and Measurements in Real Time on Fluctuating Signals

We demonstrate an optical quantum nondemolition (QND) interaction gate with a bandwidth of about 100 MHz. Employing this gate, we are able to perform QND measurements in real time on randomly fluctuating signals. Our QND gate relies upon linear optics and offline-prepared squeezed states. In contras...

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Bibliographic Details
Published inarXiv.org
Main Authors Shiozawa, Yu, Yoshikawa, Jun-ichi, Yokoyama, Shota, Kaji, Toshiyuki, Makino, Kenzo, Serikawa, Takahiro, Nakamura, Ryosuke, Suzuki, Shigenari, Yamazaki, Shota, Asavanant, Warit, Takeda, Shuntaro, Peter van Loock, Furusawa, Akira
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 22.12.2017
Subjects
Error correction
Physics - Quantum Physics
Quantum nondemolition
Quantum theory
Real time
Squeezed states (quantum theory)
Time measurement
Variation
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Summary:We demonstrate an optical quantum nondemolition (QND) interaction gate with a bandwidth of about 100 MHz. Employing this gate, we are able to perform QND measurements in real time on randomly fluctuating signals. Our QND gate relies upon linear optics and offline-prepared squeezed states. In contrast to previous demonstrations on narrow sideband modes, our gate is compatible with non-Gaussian quantum states temporally localized in a wave-packet mode, and thus opens the way for universal gate operations and realization of quantum error correction.
ISSN:2331-8422
DOI:10.48550/arxiv.1712.08411