TY - JOUR
T1 - Global entanglement and quantum criticality in spin chains
AU - Wei, Tzu Chieh
AU - Das, Dyutiman
AU - Mukhopadyay, Swagatam
AU - Vishveshwara, Smitha
AU - Goldbart, Paul M.
PY - 2005/6
Y1 - 2005/6
N2 - The entanglement of quantum XY spin chains of arbitrary length is investigated via a recently developed global measure suitable for generic quantum many-body systems. This entanglement is determined over the phase diagram and found to exhibit rich structure. In particular, the field derivative of the entanglement density becomes singular along the critical line. The form of this singularity is dictated by the universality class controlling the quantum phase transition.
AB - The entanglement of quantum XY spin chains of arbitrary length is investigated via a recently developed global measure suitable for generic quantum many-body systems. This entanglement is determined over the phase diagram and found to exhibit rich structure. In particular, the field derivative of the entanglement density becomes singular along the critical line. The form of this singularity is dictated by the universality class controlling the quantum phase transition.
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U2 - 10.1103/PhysRevA.71.060305
DO - 10.1103/PhysRevA.71.060305
M3 - Article
AN - SCOPUS:26944484337
SN - 1050-2947
VL - 71
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 6
M1 - 060305
ER -