Cristin-resultat-ID: 354682
Sist endret: 9. februar 2010 17:19
NVI-rapporteringsår: 2009
Resultat
Vitenskapelig artikkel
2009

Phase transitions and localizable entanglement in cluster-state spin chains with Ising couplings and local fields

Bidragsytere:
  • Stein Olav Skrøvseth og
  • Stephen D Bartlett

Tidsskrift

Physical Review A. Atomic, Molecular, and Optical Physics (PRA)
ISSN 1050-2947
e-ISSN 1094-1622
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2009
Volum: 80
Hefte: 2
Sider: 022316

Importkilder

Isi-ID: 000269638200047

Beskrivelse Beskrivelse

Tittel

Phase transitions and localizable entanglement in cluster-state spin chains with Ising couplings and local fields

Sammendrag

We consider a one-dimensional spin chain for which the ground state is the cluster state, capable of functioning as a quantum computational wire when subjected to local adaptive measurements of individual qubits, and investigate the robustness of this property to local and coupled (Ising-type) perturbations. We investigate the ground state both by identifying suitable correlation functions as order parameters, as well as numerically using a variational method based on matrix product states. We find that the model retains an infinite localizable entanglement length for Ising and local fields up to a quantum phase transition, but that the resulting entangled state is not simply characterized by a Pauli correction based on the measurement results.

Bidragsytere

Stein Olav Skrøvseth

  • Tilknyttet:
    Forfatter
    ved University of Sydney
  • Tilknyttet:
    Forfatter
    ved Institutt for fysikk ved Norges teknisk-naturvitenskapelige universitet

Stephen D Bartlett

  • Tilknyttet:
    Forfatter
    ved University of Sydney
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