Global entanglement and quantum criticality in spin chains

Tzu Chieh Wei, Dyutiman Das, Swagatam Mukhopadyay, Smitha Vishveshwara, Paul M. Goldbart

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish (US)
Article number060305
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number6
StatePublished - Jun 2005

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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