摘要
Using the measure of interference defined in this paper,we investigate the quantum phase transition of one-dimensional Ising chains.We find that thermal fluctuations afect the interference more strongly at the critical point.We also show that the derivative of the interference with respect to the coupling parameter,λ,can be depressed by the thermal fluctuation.Finally,we find that this suppression is due to multi-particle excitations.
Using the measure of interference defined in this paper, we investigate the quantum phase transition of one-dimensional Ising chains. We find that thermal fluctuations affect the interference more strongly at the critical point. We also show that the derivative of the interference with respect to the coupling parameter, A, can be depressed by the thermal fluctuation. Finally, we find that this suppression is due to multi-particle excitations.
基金
Supported by National Natural Science Foundation of China under Grant No.11355013
the Talent Introduction Foundation of Kunming University of Science and Technology under Grant No.2012017034
