Zobrazeno 1 - 10
of 761
pro vyhledávání: '"HORIBE, M."'
We investigate the group structure of center-preserving automorphisms of the finite Heisenberg group over $\mathbb Z_N$ with $U(1)$ extension, which arises in finite-dimensional quantum mechanics on a discrete phase space. Constructing an explicit sp
Externí odkaz:
http://arxiv.org/abs/2307.00874
Publikováno v:
Phys. Rev. A 103, 052429 (2021)
Local distinguishability of sets of generalized Bell states (GBSs) is investigated. We first clarify the conditions such that a set of GBSs can be locally transformed to a certain type of GBS set that is easily distinguishable within local operations
Externí odkaz:
http://arxiv.org/abs/2102.07400
Publikováno v:
Phys. Rev. A 97, 052323 (2018)
We investigate the performance of discrimination strategy in the comparison task of known quantum states. In the discrimination strategy, one infers whether or not two quantum systems are in the same state on the basis of the outcomes of separate dis
Externí odkaz:
http://arxiv.org/abs/1803.09030
The phase point operator $\Delta(q,p)$ is the quantum mechanical counterpart of the classical phase point $(q,p)$. The discrete form of $\Delta(q,p)$ was formulated for an odd number of lattice points by Cohendet et al. and for an even number of latt
Externí odkaz:
http://arxiv.org/abs/1802.09891
Publikováno v:
Phys. Rev. A 99, 022126 (2019)
We construct minimum-uncertainty states and a non-negative quasi probability distribution for quantum systems on a finite-dimensional space. We reexamine the theorem of Massar and Spindel for the uncertainty relationof the two unitary operators relat
Externí odkaz:
http://arxiv.org/abs/1704.03222
Publikováno v:
Phys. Rev. A.82, 032338(2010)
Complete solutions are given in a closed analytic form for unambiguous discrimination of three general pure states with real mutual inner products. For this purpose, we first establish some general results on unambiguous discrimination of n linearly
Externí odkaz:
http://arxiv.org/abs/1007.5112
Publikováno v:
Phys. Rev. A 81, 062327 (2010)
We investigate a discrimination scheme between unitary processes. By introducing a margin for the probability of erroneous guess, this scheme interpolates the two standard discrimination schemes: minimum-error and unambiguous discrimination. We prese
Externí odkaz:
http://arxiv.org/abs/0912.2610
Publikováno v:
Phys. Rev. A 80, 052322 (2009)
We investigate a state discrimination problem which interpolates minimum-error and unambiguous discrimination by introducing a margin for the probability of error. We closely analyze discrimination of two pure states with general occurrence probabili
Externí odkaz:
http://arxiv.org/abs/0906.4884
Publikováno v:
Phys. Rev. A 78, 012309 (2008)
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 no classical knowledge of the reference states is given, but a certain
Externí odkaz:
http://arxiv.org/abs/0807.1364
Publikováno v:
Phys. Rev. A 78, 012333 (2008)
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 probability is maximized. The other is unambiguous discrimination where
Externí odkaz:
http://arxiv.org/abs/0804.4349