تقرير
Global quantum correlations in finite-size spin chains
| العنوان: | Global quantum correlations in finite-size spin chains |
|---|---|
| المؤلفون: | Campbell, S., Mazzola, L., De Chiara, G., Apollaro, T. J. G, Plastina, F., Busch, Th., Paternostro, M. |
| المصدر: | New J. Phys. 15, 043033 (2013) |
| سنة النشر: | 2013 |
| المجموعة: | Condensed Matter Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics, Condensed Matter - Quantum Gases |
| الوصف: | We perform an extensive study of the properties of global quantum correlations in finite-size one-dimensional quantum spin models at finite temperature. By adopting a recently proposed measure for global quantum correlations [C. C. Rulli, and M. S. Sarandy, Phys. Rev. A, 84, 042109 (2011)], called global discord, we show that critical points can be neatly detected even for many-body systems that are not in their ground state. We consider the transverse Ising model, the cluster-Ising model where three-body couplings compete with an Ising-like interaction, and the nearest-neighbor XX Hamiltonian in transverse magnetic field. These models embody our canonical examples showing the sensitivity of global quantum discord close to criticality. For the Ising model, we find a universal scaling of global discord with the critical exponents pertaining to the Ising universality class. Comment: 8 pages, 8 figures, RevTeX4, Published Version |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/1367-2630/15/4/043033 |
| URL الوصول: | http://arxiv.org/abs/1301.7114 |
| رقم الأكسشن: | edsarx.1301.7114 |
| قاعدة البيانات: | arXiv |
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