Dynamics of entanglement in quantum computers with imperfections

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dc.creatorMontangero, Simone
dc.creatorBenenti, Giuliano
dc.creatorFazio, Rosario
dc.date2003-07-05
dc.date.accessioned2026-07-07T06:07:15Z
dc.date.available2026-07-07T06:07:15Z
dc.descriptionThe dynamics of the pairwise entanglement in a qubit lattice in the presence of static imperfections exhibits different regimes. We show that there is a transition from a perturbative region, where the entanglement is stable against imperfections, to the ergodic regime, in which a pair of qubits becomes entangled with the rest of the lattice and the pairwise entanglement drops to zero. The transition is almost independent of the size of the quantum computer. We consider both the case of an initial maximally entangled and separable state. In this last case there is a broad crossover region in which the computer imperfections can be used to create a significant amount of pairwise entanglement.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/quant-ph/0307036
dc.identifierhttp://arxiv.org/abs/quant-ph/0307036
dc.identifierPhys. Rev. Lett. 91, 187901 (2003)
dc.identifierdoi:10.1103/PhysRevLett.91.187901
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/91226
dc.subjectQuantum Physics
dc.subjectDisordered Systems and Neural Networks
dc.titleDynamics of entanglement in quantum computers with imperfections
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