Articles dans des revues à comité de lecture
|Evolution of the magnetization after a local quench in the critical transverse-field Ising chain|
|Iglói F., Roósz G., Turban L.|
|J. Stat. Mech. (2014) P03023|
|DOI : 10.1088/1742-5468/2014/03/P030|
|ArXiv : arxiv:1402.1744 [PDF]|
We study the time evolution of the local magnetization in the critical Ising chain in a transverse field after a sudden change of the parameters at a defect. The relaxation of the defect magnetization is algebraic and the corresponding exponent, which is a continuous function of the defect parameters, is calculated exactly. In finite chains the relaxation is oscillating in time and its form is conjectured on the basis of precise numerical calculations.