Thermalization through unitary evolution of pure states
Quantum Physics
2007-05-23 v2
Abstract
The unitary time evolution of a critical quantum spin chain with an impurity is calculated, and the entanglement evolution is shown. Moreover, we show that the reduced density matrix of a part of the chain evolves such that the fidelity of its spectrum is very high with respect to a state in thermal equilibrium. Hence, a thermal state occurs through unitary time evolution in a simple spin chain with impurity.
Cite
@article{arxiv.quant-ph/0606216,
title = {Thermalization through unitary evolution of pure states},
author = {Stein Olav Skrøvseth},
journal= {arXiv preprint arXiv:quant-ph/0606216},
year = {2007}
}
Comments
8 pages, 7 figures