223 citations · 240 across the 4 of their papers we have counts for
4 papers
A smoothing theory for open quantum systems: The least mean square approach
Kentaro Ohki
Unlike the classical smoothing theory, it is well known that quantum smoothers are, in general, not well--defined by the quantum conditional expectation. The purpose of this paper…
A proposal of adaptive parameter tuning for robust stabilizing control of --level quantum angular momentum systems
Shoju Enami, Kentaro Ohki
Stabilizing control synthesis is one of the central subjects in control theory and engineering, and it always has to deal with unavoidable uncertainties in practice. In this study,…
Threshold theorem in isolated quantum dynamics with stochastic control errors
Manaka Okuyama, Kentaro Ohki, Masayuki Ohzeki
We investigate the effect of stochastic control errors in the time-dependent Hamiltonian on isolated quantum dynamics. The control errors are formulated as time-dependent stochasti…
Quantum-enhanced optical phase tracking
Hidehiro Yonezawa, Daisuke Nakane, Trevor A. Wheatley +10
Tracking a randomly varying optical phase is a key task in metrology, with applications in optical communication. The best precision for optical phase tracking has till now been li…