Quantum phase transitions and entanglement in J(1)-J(2) model

Eryiǧit R., Eryiǧit R., Gündüç Y.

INTERNATIONAL JOURNAL OF MODERN PHYSICS C, cilt.15, sa.8, ss.1095-1103, 2004 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 15 Sayı: 8
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1142/s0129183104006558
  • Dergi Adı: INTERNATIONAL JOURNAL OF MODERN PHYSICS C
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1095-1103
  • Anahtar Kelimeler: quantum computing, entanglement, concurrence, J(1)-J(2) model, NEAREST-NEIGHBOR INTERACTIONS, ANTIFERROMAGNETIC HEISENBERG CHAIN, GROUND-STATE PROPERTIES, COMPETING INTERACTIONS, THERMAL ENTANGLEMENT, LINEAR CHAIN, XXZ CHAIN, IMPURITY
  • Ankara Üniversitesi Adresli: Hayır

Özet

We study ground state pairwise entanglement within one-dimensional spin-1/2 anti-ferromagnetic J(1)-J(2) model with competing interactions. Contrary to some claims we found that frustration does not increase entanglement. Concurrence of nearest and next nearest neighbors are found to show abrupt change at phase transition points. We also show that the concurrence can be used to classify the phase diagram of the model in anisotropy-frustration plane.