Analytic results on long distance entanglement mediated by gapped spin chains
| dc.creator | Ferreira, A. | |
| dc.creator | Santos, J. M. B. Lopes dos | |
| dc.date | 2007-08-02 | |
| dc.date | 2008-04-10 | |
| dc.date.accessioned | 2026-07-07T09:31:10Z | |
| dc.date.available | 2026-07-07T09:31:10Z | |
| dc.description | We give an analytical description of long distance entanglement (LDE) mediated by one-dimensional quantum spin chains recently found in numerical studies. We develop a formalism that allows the computation of LDE for weakly interacting probes with gapped many-body systems. At zero temperature, a DC response function determines the ability of the physical system to generate genuine quantum correlations between the probes. We show that the biquadratic Heisenberg spin-1 chain is able to produce LDE in the thermodynamical limit and that the finite antiferromagnetic Heisenberg chain maximally entangles two spin-1/2 probes very far apart. These results support the current perspective of using quantum spin chains as entanglers or quantum channels in quantum information devices. | |
| dc.description | 4 pages, 2 figures, submitted for publication | |
| dc.identifier | https://arxiv.org/abs/0708.0320 | |
| dc.identifier | http://arxiv.org/abs/0708.0320 | |
| dc.identifier | Phys. Rev. A. 77 (2008) 034301 | |
| dc.identifier | doi:10.1103/PhysRevA.77.034301 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/158367 | |
| dc.subject | Quantum Physics | |
| dc.title | Analytic results on long distance entanglement mediated by gapped spin chains | |
| dc.type | text |