Physics – Quantum Physics
Scientific paper
2009-05-10
Phys. Rev. A 80, 022316 (2009)
Physics
Quantum Physics
11 pages, 7 figures, comments welcome; v2 gives some further analytic results for the localizable entanglement, and some addit
Scientific paper
10.1103/PhysRevA.80.022316
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.
Bartlett Stephen D.
Skrøvseth Stein Olav
No associations
LandOfFree
Phase transitions and localizable entanglement in cluster-state spin chains with Ising couplings and local fields does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Phase transitions and localizable entanglement in cluster-state spin chains with Ising couplings and local fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase transitions and localizable entanglement in cluster-state spin chains with Ising couplings and local fields will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-570370