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Quantum-enhanced optical phase-insensitive heterodyne detection beyond 3-dB noise penalty of image band
Keitaro Anai, Yutaro Enomoto, Hiroto Omura +4
Optical phase-insensitive heterodyne (beat-note) detection, which measures the relative phase of two beams at different frequencies through their interference, is a key sensing tec…
Time-Domain Universal Linear-Optical Operations for Universal Quantum Information Processing
Kazuma Yonezu, Yutaro Enomoto, Takato Yoshida +1
We demonstrate universal and programmable three-mode linear optical operations in the time domain by realizing a scalable dual-loop optical circuit suitable for universal quantum i…
Programmable time-multiplexed squeezed light source
Hiroko Tomoda, Takato Yoshida, Takahiro Kashiwazaki +3
One of the leading approaches to large-scale quantum information processing (QIP) is the continuous-variable (CV) scheme based on time multiplexing (TM). As a fundamental building…
Continuous-variable quantum approximate optimization on a programmable photonic quantum processor
Yutaro Enomoto, Keitaro Anai, Kenta Udagawa +1
Variational quantum algorithms (VQAs) provide a promising approach to achieving quantum advantage for practical problems on near-term noisy intermediate-scale quantum (NISQ) device…
Improving force sensitivity by amplitude measurement of light reflected from a detuned optomechanical cavity
Kentaro Komori, Takuya Kawasaki, Sotatsu Otabe +3
The measurement of weak continuous forces exerted on a mechanical oscillator is a fundamental problem in various physical experiments. It is fundamentally impeded by quantum back-a…
Atto-Nm Torque Sensing with a Macroscopic Optomechanical Torsion Pendulum
Kentaro Komori, Yutaro Enomoto, Ching Pin Ooi +5
Precise measurements of the displacement of, and force acting on, a mechanical oscillator can be performed by coupling the oscillator to an optical cavity. Brownian thermal forces…
Standard quantum limit of angular motion of a suspended mirror and homodyne detection of ponderomotively squeezed vacuum field
Yutaro Enomoto, Koji Nagano, Seiji Kawamura
Compared to the quantum noise in the measurement of the translational motion of a suspended mirror using laser light, the quantum noise in the measurement of the angular motion of…