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Statements

Subject Item
n2:RIV%2F68407700%3A21340%2F06%3A04121607%21RIV07-GA0-21340___
rdf:type
skos:Concept n15:Vysledek
dcterms:description
The structure is investigated of all completely positive quantum operations that transform pure two-qubit input states of a given degree of entanglement in a covariant way. Special cases thereof are quantum NOT operations which transform entangled pure two-qubit input states of a given degree of entanglement into orthogonal states in an optimal way. Based on our general analysis all covariant optimal two-qubit quantum NOT operations are determined. In particular, it is demonstrated that only in the case of maximally entangled input states can these quantum NOT operations be performed perfectly. The structure is investigated of all completely positive quantum operations that transform pure two-qubit input states of a given degree of entanglement in a covariant way. Special cases thereof are quantum NOT operations which transform entangled pure two-qubit input states of a given degree of entanglement into orthogonal states in an optimal way. Based on our general analysis all covariant optimal two-qubit quantum NOT operations are determined. In particular, it is demonstrated that only in the case of maximally entangled input states can these quantum NOT operations be performed perfectly. Studujeme strukturu vsech uplne pozitivnich kvantovych operaci ktere prevadeji vstupni stav s danym provazanim na vystupni stav kovariantnim zpusobem. Specialnim pripadem takoveho zabrazeni je kvantova NOT operace, ktera transformuje optimalne provazany dvou qubitovy stav na jeho ortogonalni komplement. Na zaklade obecne analyzy procesu je podana uplna klasifikace NOT operaci a je ukazano, ze naprosto verna muze byt NOT operace jenom pro maximalne provazane stavy.
dcterms:title
Completely Positive Covariant two-Qubit Quantum Processes and Optimal Quantum NOT Operations for Entangled Qubit Pairs Zcela positvní kovariantní 2-qubitové kvantové procesy and optimální kvantové NOT operace for entanglované páry qubitů Completely Positive Covariant two-Qubit Quantum Processes and Optimal Quantum NOT Operations for Entangled Qubit Pairs
skos:prefLabel
Completely Positive Covariant two-Qubit Quantum Processes and Optimal Quantum NOT Operations for Entangled Qubit Pairs Completely Positive Covariant two-Qubit Quantum Processes and Optimal Quantum NOT Operations for Entangled Qubit Pairs Zcela positvní kovariantní 2-qubitové kvantové procesy and optimální kvantové NOT operace for entanglované páry qubitů
skos:notation
RIV/68407700:21340/06:04121607!RIV07-GA0-21340___
n3:strany
062311;062311
n3:aktivita
n18:P
n3:aktivity
P(GA202/04/2101), P(LC06002)
n3:cisloPeriodika
0
n3:dodaniDat
n7:2007
n3:domaciTvurceVysledku
n10:7045247 n10:2434644
n3:druhVysledku
n16:J
n3:duvernostUdaju
n8:S
n3:entitaPredkladatele
n13:predkladatel
n3:idSjednocenehoVysledku
469380
n3:idVysledku
RIV/68407700:21340/06:04121607
n3:jazykVysledku
n17:eng
n3:klicovaSlova
maps; optimal cloning; pure states
n3:klicoveSlovo
n6:pure%20states n6:optimal%20cloning n6:maps
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[6280DA533E0D]
n3:nazevZdroje
Physical Review A
n3:obor
n11:BE
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
3
n3:projekt
n12:GA202%2F04%2F2101 n12:LC06002
n3:rokUplatneniVysledku
n7:2006
n3:svazekPeriodika
73
n3:tvurceVysledku
Novotný, Jaroslav Jex, Igor Alber, G.
s:issn
1050-2947
s:numberOfPages
12
n4:organizacniJednotka
21340