54 citations · 74 across the 6 of their papers we have counts for
12 papers · 1 filter
Locality and nonlocality in quantum pure-state identification problems
Y. Ishida, T. Hashimoto, M. Horibe +1
Suppose we want to identify an input state with one of two unknown reference states, where the input state is guaranteed to be equal to one of the reference states. We assume that…
State discrimination with error margin and its locality
A. Hayashi, T. Hashimoto, M. Horibe
There are two common settings in a quantum-state discrimination problem. One is minimum-error discrimination where a wrong guess (error) is allowed and the discrimination success p…
Local Quantum Pure-state Identification without Classical Knowledge
Y. Ishida, T. Hashimoto, M. Horibe +1
Suppose we want to distinguish two quantum pure states. We consider the case in which no classical knowledge on the two states is given and only a pair of samples of the two states…
Nonlocality in unambiguous pure-state identification without classical knowledge
A. Hayashi, Y. Ishida, T. Hashimoto +1
For two bipartite pure states, we consider the problem of unambiguous identification without classical knowledge on the states. The optimal success probability by means of local op…
Optimal estimation of an observable's expectation value for pure states for general measure of deviation
Minoru Horibe, Akihisa Hayashi, Takaaki Hashimoto
We investigate the optimal estimation of quantum expectation value of a physical observable, which minimizes a mean error with respect to general measure of deviation, when a finit…
Stationary quantum Markov process for the Wigner function
T. Hashimoto, M. Horibe, A. Hayashi
As a stochastic model for quantum mechanics we present a stationary quantum Markov process for the time evolution of the Wigner function on a lattice phase space Z_N x Z_N with N o…