Quantum Monte Carlo simulations of S=1 disordered Heisenberg spin chains
Quasilocal conserved quantities and transport in integrable one-dimensional systems
Quantum phase transitions in one-dimensional integrable systems
| Full text | |
| Author(s): |
Total Authors: 4
|
| Affiliation: | [1] Missouri Univ Sci & Technol, Dept Phys, Rolla, MO 65409 - USA
[2] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
[3] Indian Inst Technol Madras, Dept Phys, Chennai 600036, Tamil Nadu - India
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Physical Review B; v. 89, n. 1 JAN 3 2014. |
| Web of Science Citations: | 7 |
| Abstract | |
We study the ground-state phase diagram of the Ashkin-Teller random quantum spin chain by means of a generalization of the strong-disorder renormalization group. In addition to the conventional paramagnetic and ferromagnetic (Baxter) phases, we find a partially ordered phase characterized by strong randomness and infinite coupling between the colors. This unusual phase acts, at the same time, as a Griffiths phase for two distinct quantum phase transitions, both of which are of infinite-randomness type. We also investigate the quantum multicritical point that separates the two-phase and three-phase regions, and we discuss generalizations of our results to higher dimensions and other systems. (AU) | |
| FAPESP's process: | 13/09850-7 - Disorder, Dynamics, Frustration and Topology in Quantum Condensed Matter |
| Grantee: | José Abel Hoyos Neto |
| Support Opportunities: | Research Grants - Meeting - Abroad |