English

Persistence of coherent quantum dynamics at strong dissipation

Statistical Mechanics 2015-06-04 v4 Quantum Physics

Abstract

The quantum dynamics of a two state system coupled to a bosonic reservoir with sub-Ohmic spectral density is investigated for strong friction. Numerically exact path integral Monte Carlo methods reveal that in contrast to conventional expectations, coherent dynamics never turns into incoherent decay for a broad class of spectral distributions. Coherences associated with substantial system-reservoir entanglement exist in non-equilibrium even when strong dissipation makes the thermodynamic state of the system to behave essentially classical. This may be of relevance for current experiments with nanoscale devices and bio-molecular aggregates.

Keywords

Cite

@article{arxiv.1204.4029,
  title  = {Persistence of coherent quantum dynamics at strong dissipation},
  author = {Denis Kast and Joachim Ankerhold},
  journal= {arXiv preprint arXiv:1204.4029},
  year   = {2015}
}

Comments

5 pages, 5 figures

R2 v1 2026-06-21T20:51:19.307Z