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Statements

Subject Item
n2:RIV%2F00216224%3A14330%2F01%3A00005666%21RIV%2F2002%2FGA0%2F143302%2FN
rdf:type
n11:Vysledek skos:Concept
dcterms:description
We show that for any Hilbert-space dimension, the optimal 1-->2 universal quantum cloner can be constructed from essentially the same quantum circuit, i.e., we find a universal design for universal cloners. In the case of infinite dimensions (which includes continuous variable quantum systems) the universal cloner reduces to an essentially classical device. More generally, we construct a universal quantum circuit for distributing qudits in any dimension which acts covariantly under generalized displacements and momentum kicks. The behavior of this covariant distributor is controlled by its initial state. We show that suitable choices for this initial state yield both universal cloners and optimized cloners for limited alphabets of states related by generalized phase-space displacements. We show that for any Hilbert-space dimension, the optimal 1-->2 universal quantum cloner can be constructed from essentially the same quantum circuit, i.e., we find a universal design for universal cloners. In the case of infinite dimensions (which includes continuous variable quantum systems) the universal cloner reduces to an essentially classical device. More generally, we construct a universal quantum circuit for distributing qudits in any dimension which acts covariantly under generalized displacements and momentum kicks. The behavior of this covariant distributor is controlled by its initial state. We show that suitable choices for this initial state yield both universal cloners and optimized cloners for limited alphabets of states related by generalized phase-space displacements.
dcterms:title
Quantum information distributors: Quantum network for symmetric and asymmetric cloning in arbitrary dimension and continuous limit Quantum information distributors: Quantum network for symmetric and asymmetric cloning in arbitrary dimension and continuous limit
skos:prefLabel
Quantum information distributors: Quantum network for symmetric and asymmetric cloning in arbitrary dimension and continuous limit Quantum information distributors: Quantum network for symmetric and asymmetric cloning in arbitrary dimension and continuous limit
skos:notation
RIV/00216224:14330/01:00005666!RIV/2002/GA0/143302/N
n5:strany
2313
n5:aktivita
n13:P
n5:aktivity
P(GA201/98/0369)
n5:cisloPeriodika
5
n5:dodaniDat
n6:2002
n5:domaciTvurceVysledku
n17:4347196
n5:druhVysledku
n16:J
n5:duvernostUdaju
n18:S
n5:entitaPredkladatele
n9:predkladatel
n5:idSjednocenehoVysledku
693798
n5:idVysledku
RIV/00216224:14330/01:00005666
n5:jazykVysledku
n10:eng
n5:klicovaSlova
quantum theory
n5:klicoveSlovo
n12:quantum%20theory
n5:kodStatuVydavatele
US - Spojené státy americké
n5:kontrolniKodProRIV
[F5229BE13C62]
n5:nazevZdroje
Physical Review A
n5:obor
n15:BE
n5:pocetDomacichTvurcuVysledku
1
n5:pocetTvurcuVysledku
3
n5:pocetUcastnikuAkce
0
n5:pocetZahranicnichUcastnikuAkce
0
n5:projekt
n14:GA201%2F98%2F0369
n5:rokUplatneniVysledku
n6:2001
n5:svazekPeriodika
63
n5:tvurceVysledku
Braunstein, S. L. Hillery, M. Bůžek, Vladimír
s:issn
1050-2947
s:numberOfPages
10
n7:organizacniJednotka
14330