Quantum nondemolition gate operations and measurements in real time on fluctuating signals

Author(s): Yu Shiozawa, Jun-ichi Yoshikawa, Shota Yokoyama, Toshiyuki Kaji, Kenzo Makino, Takahiro Serikawa, Ryosuke Nakamura, Shigenari Suzuki, Shota Yamazaki, Warit Asavanant, Shuntaro Takeda, Peter van Loock, and Akira Furusawa
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 on linear optics and offline-prepared squeezed states. In contrast ...
[Phys. Rev. A 98, 052311] Published Fri Nov 09, 2018

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