Decoherence by engineered quantum baths
Quantum Physics
2007-06-27 v1 Other Condensed Matter
Abstract
We introduce, and determine decoherence for, a wide class of non-trivial quantum spin baths which embrace Ising, XY and Heisenberg universality classes coupled to a two-level system. For the XY and Ising universality classes we provide an exact expression for the decay of the loss of coherence beyond the case of a central spin coupled uniformly to all the spins of the baths which has been discussed so far in the literature. In the case of the Heisenberg spin bath we study the decoherence by means of the time-dependent density matrix renormalization group. We show how these baths can be engineered, by using atoms in optical lattices.
Cite
@article{arxiv.quant-ph/0605051,
title = {Decoherence by engineered quantum baths},
author = {Davide Rossini and Tommaso Calarco and Vittorio Giovannetti and Simone Montangero and Rosario Fazio},
journal= {arXiv preprint arXiv:quant-ph/0605051},
year = {2007}
}
Comments
4 pages, 4 figures