Complexity of thermal states in quantum spin chains
| dc.creator | Znidaric, Marko | |
| dc.creator | Prosen, Tomaz | |
| dc.creator | Pizorn, Iztok | |
| dc.date | 2008-05-27 | |
| dc.date | 2008-08-12 | |
| dc.date.accessioned | 2026-07-07T09:55:49Z | |
| dc.date.available | 2026-07-07T09:55:49Z | |
| dc.description | We study quantum correlations and complexity of simulation, characterized by quantum mutual information and entanglement entropy in operator space respectively, for thermal states in critical, non-critical and quantum chaotic spin chains. A simple general relation between the two quantities is proposed. We show that in all cases mutual information and entanglement entropy saturate with the system size, whereas as a function of the inverse temperature, we find logarithmic divergences for critical cases and uniform bounds in non-critical cases. A simple efficient quasi-exact method for computation of arbitrary entropy related quantities in thermalized XY spin chains is proposed. | |
| dc.description | 5 pages, 3 eps figures; v2. minor changes, sections added | |
| dc.identifier | https://arxiv.org/abs/0805.4149 | |
| dc.identifier | http://arxiv.org/abs/0805.4149 | |
| dc.identifier | Phys. Rev. A 78, 022103 (2008) | |
| dc.identifier | doi:10.1103/PhysRevA.78.022103 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/166762 | |
| dc.subject | Quantum Physics | |
| dc.title | Complexity of thermal states in quantum spin chains | |
| dc.type | text |