4 papers
Unbiased Estimation of Conditional Covariance for Quantum Optomechanics
Katsuta Sakai, Nobuyuki Matsumoto
Continuous measurements can prepare macroscopic mechanical oscillators in conditional quantum states, but their covariance is difficult to verify. The conventional retrodictive est…
Space-based cm/kg-scale Laser Interferometer for Quantum Gravity
Nobuyuki Matsumoto, Katsuta Sakai, Kosei Hatakeyama +5
The experimental verification of the quantum nature of gravity represents a milestone in quantum gravity research. Recently, interest has grown for testing it via gravitationally i…
Preconditioned flow as a solution to the hierarchical growth problem in the generalized Lefschetz thimble method
Jun Nishimura, Katsuta Sakai, Atis Yosprakob
The generalized Lefschetz thimble method is a promising approach that attempts to solve the sign problem in Monte Carlo methods by deforming the integration contour using the flow…
Towards a spatial cat state of a massive pendulum
Satoshi Iso, Jinyang Li, Nobuyuki Matsumoto +1
We propose an experiment for constructing a spatial cat state of a suspended mirror with an order of (mg). The mirror is set at the center of two mirrors, creating two…