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Statements

Subject Item
n2:RIV%2F00216224%3A14330%2F05%3A00013054%21RIV10-GA0-14330___
rdf:type
skos:Concept n18:Vysledek
dcterms:description
We consider multiqubit systems and relate quantitatively the problems of generating cluster states with high values of concurrence of assistance, and of generating states with maximal bipartite entanglement. We prove an upper bound for the concurrence of assistance. We consider dynamics of spin-1/2 systems that model qubits, with different couplings and possible presence of magnetic field, to investigate the appearance of the discussed entanglement properties. We find that states with maximal bipartite entanglement can be generated by an isotropic XY Hamiltonian, and their generation can be controlled by the initial state of one of the spins. The same Hamiltonian is capable of creating states with high concurrence of assistance from a suitably chosen initial state. We show that the production of graph states using the Ising Hamiltonian is controllable via a single-qubit rotation of one spin-1/2 subsystem in the initial multiqubit state. We consider multiqubit systems and relate quantitatively the problems of generating cluster states with high values of concurrence of assistance, and of generating states with maximal bipartite entanglement. We prove an upper bound for the concurrence of assistance. We consider dynamics of spin-1/2 systems that model qubits, with different couplings and possible presence of magnetic field, to investigate the appearance of the discussed entanglement properties. We find that states with maximal bipartite entanglement can be generated by an isotropic XY Hamiltonian, and their generation can be controlled by the initial state of one of the spins. The same Hamiltonian is capable of creating states with high concurrence of assistance from a suitably chosen initial state. We show that the production of graph states using the Ising Hamiltonian is controllable via a single-qubit rotation of one spin-1/2 subsystem in the initial multiqubit state.
dcterms:title
Direct versus measurement-assisted bipartite entanglement in multiqubit systems and their dynamical generation in spin systems Direct versus measurement-assisted bipartite entanglement in multiqubit systems and their dynamical generation in spin systems
skos:prefLabel
Direct versus measurement-assisted bipartite entanglement in multiqubit systems and their dynamical generation in spin systems Direct versus measurement-assisted bipartite entanglement in multiqubit systems and their dynamical generation in spin systems
skos:notation
RIV/00216224:14330/05:00013054!RIV10-GA0-14330___
n4:aktivita
n6:P n6:Z
n4:aktivity
P(GA201/04/1153), Z(MSM0021622419)
n4:cisloPeriodika
No. 2
n4:dodaniDat
n5:2010
n4:domaciTvurceVysledku
n16:4347196
n4:druhVysledku
n9:J
n4:duvernostUdaju
n19:S
n4:entitaPredkladatele
n11:predkladatel
n4:idSjednocenehoVysledku
518212
n4:idVysledku
RIV/00216224:14330/05:00013054
n4:jazykVysledku
n8:eng
n4:klicovaSlova
quantum entanglement; spin systems
n4:klicoveSlovo
n10:quantum%20entanglement n10:spin%20systems
n4:kodStatuVydavatele
US - Spojené státy americké
n4:kontrolniKodProRIV
[184CA134A130]
n4:nazevZdroje
Physical Review A
n4:obor
n14:BE
n4:pocetDomacichTvurcuVysledku
1
n4:pocetTvurcuVysledku
3
n4:projekt
n12:GA201%2F04%2F1153
n4:rokUplatneniVysledku
n5:2005
n4:svazekPeriodika
Vol. 72
n4:tvurceVysledku
Rapčan, Peter Koniorczyk, Matyas Bužek, Vladimír
n4:wos
000231564200053
n4:zamer
n17:MSM0021622419
s:issn
1050-2947
s:numberOfPages
12
n15:organizacniJednotka
14330