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6 papers · 2 filters
The Cost of Randomness for Converting a Tripartite Quantum State to be Approximately Recoverable
Eyuri Wakakuwa, Akihito Soeda, Mio Murao
We introduce and analyze a task in which a tripartite quantum state is transformed to an approximately recoverable state by a randomizing operation on one of the three subsystems.…
Cavity optomagnonics with spin-orbit coupled photons
A. Osada, R. Hisatomi, A. Noguchi +7
We experimentally implement a system of cavity optomagnonics, where a sphere of ferromagnetic material supports whispering gallery modes (WGMs) for photons and the magnetostatic mo…
Entanglement detection from channel parameter estimation problem
Jun Suzuki
We derive a general criterion to detect entangled states in multi-partite systems based on the symmetric logarithmic derivative quantum Fisher information. This criterion is a dire…
Explicit formula for the Holevo bound for two-parameter qubit estimation problem
Jun Suzuki
The main contribution of this paper is to derive an explicit expression for the fundamental precision bound, the Holevo bound, for estimating any two-parameter family of qubit mixe…
Markovianizing Cost of Tripartite Quantum States
Eyuri Wakakuwa, Akihito Soeda, Mio Murao
We introduce and analyze a task that we call Markovianization, in which a tripartite quantum state is transformed to a quantum Markov chain by a randomizing operation on one of the…
Experimental violation of Bell inequalities for multi-dimensional systems
Hsin-Pin Lo, Che-Ming Li, Atsushi Yabushita +3
Quantum correlations between spatially separated parts of a -dimensional bipartite system () have no classical analog. Such correlations, also called entanglements, are…