Zobrazeno 1 - 10
of 70
pro vyhledávání: '"Usuda, Tsuyoshi Sasaki"'
Publikováno v:
Quantum Information and Computation, Vol.20, No.1&2, pp.14-36, (Feb. 2020)
For matrix $A$, vector $\boldsymbol{b}$ and function $f$, the computation of vector $f(A)\boldsymbol{b}$ arises in many scientific computing applications. We consider the problem of obtaining quantum state $\lvert f \rangle$ corresponding to vector $
Externí odkaz:
http://arxiv.org/abs/2106.08075
The matrix functions can be defined by Cauchy's integral formula and can be approximated by the linear combination of inverses of shifted matrices using a quadrature formula. In this paper, we show a concrete construction of a framework to implement
Externí odkaz:
http://arxiv.org/abs/2106.08076
Publikováno v:
Phys. Rev. A 99, 022316 (2019)
We investigate unambiguous discrimination between given quantum states with a sequential measurement, which is restricted to local measurements and one-way classical communication. If the given states are binary or those each of whose individual syst
Externí odkaz:
http://arxiv.org/abs/1806.08784
Publikováno v:
Phys. Rev. A 97, 022340 (2018)
We investigate an optimization problem of finding quantum sequential measurements, which forms a wide class of state discrimination problems with the restriction that only sequential measurements are allowed. Sequential measurements from Alice to Bob
Externí odkaz:
http://arxiv.org/abs/1707.04736
Publikováno v:
Phys. Rev. A 97, 022320 (2018)
It is well known that a minimum error quantum measurement for arbitrary binary optical coherent states can be realized by a receiver that comprises interfering with a coherent reference light, photon counting, and feedback control. We show that, for
Externí odkaz:
http://arxiv.org/abs/1706.02125
Akademický článek
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Publikováno v:
Phys. Rev. A 97, 012103 (2018)
We propose upper and lower bounds on the maximum success probability for discriminating given quantum states. The proposed upper bound is obtained from a suboptimal solution to the dual problem of the corresponding optimal state discrimination proble
Externí odkaz:
http://arxiv.org/abs/1601.06231
Publikováno v:
IEEE Trans. Inf. Theory 63, 7845 (2017)
We try to find an optimal quantum measurement for generalized quantum state discrimination problems, which include the problem of finding an optimal measurement maximizing the average correct probability with and without a fixed rate of inconclusive
Externí odkaz:
http://arxiv.org/abs/1510.05202
We investigate quantum state discrimination with confidentiality. $N$ observers share a given quantum state belonging to a finite set of known states. The observers want to determine the state as accurately as possible and send a discrimination resul
Externí odkaz:
http://arxiv.org/abs/1503.05325
Publikováno v:
IEEE Trans. Inf. Theory 64, 613 (2018)
We study the discrimination of multipartite quantum states by local operations and classical communication. We derive that any optimal discrimination of quantum states spanning a two-dimensional Hilbert space in which each party's space is finite dim
Externí odkaz:
http://arxiv.org/abs/1501.06222