Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-11-17
Phys. Rev. B 81, 100412(R) (2010)
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 4 figures. All comments are welcome.
Scientific paper
We show that, in the gapless Kondo Regime, a single local quench at one end of a Kondo spin chain induces a fast and long lived oscillatory dynamics. This quickly establishes a high quality entanglement between the spins at the opposite ends of the chain. This entanglement is mediated by the Kondo Cloud, attains a constant high value independent of the length for large chains, and shows thermal robustness. In contrast, when the Kondo cloud is absent, e.g. in the gapped dimer regime, only finite size end to end effects can create some entanglement on a much longer time-scale for rather short chains. By decoupling one end of the chain during the dynamics one can distinguish between this end-end effect which vanishes, and the global Kondo cloud mediated entanglement, which persists. This quench approach paves the way to detect the elusive Kondo cloud through the entanglement between two individual spins. Our results show that non-perturbative cooperative phenomena from condensed matter may be exploited for quantum information.
Bayat Abolfazl
Bose Sougato
Sodano Pasquale
No associations
LandOfFree
Kondo Cloud Mediated Long Range Entanglement After Local Quench in a Spin Chain 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 Kondo Cloud Mediated Long Range Entanglement After Local Quench in a Spin Chain, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kondo Cloud Mediated Long Range Entanglement After Local Quench in a Spin Chain will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-466646