Quantum correlations in spin chains at finite temperatures and quantum phase transitions

Details Quantum correlations in spin chains at finite temperatures and quantum phase transitions Quantum correlations in spin chains at finite temperatures and quantum phase transitions

2010-06-16

arxiv.org/abs/1006.3332v2

Phys. Rev. Lett. 105, 095702 (2010)

Physics

Quantum Physics

4 pages, 4 figures, RevTex4-1; v2: published version

Scientific paper

We compute the quantum correlation (quantum discord (QD)) and the entanglement (EoF) between nearest neighbor qubits (spin-1/2) in an infinite chain described by the Heisenberg model (XXZ Hamiltonian) at finite temperatures. The chain is in the thermodynamic limit and thermalized with a reservoir at temperature T (canonical ensemble). We show that QD, in contrast to EoF and other thermodynamic quantities, spotlight the critical points associated to quantum phase transitions (QPT) for this model even at finite T. This remarkable property of QD may have important implications for experimental characterization of QPTs when one is unable to reach temperatures below which a QPT can be seen.

Affiliated with

Also associated with

No associations

Rating

Quantum correlations in spin chains at finite temperatures and quantum phase transitions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Quantum correlations in spin chains at finite temperatures and quantum phase transitions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum correlations in spin chains at finite temperatures and quantum phase transitions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-550869