Study of Loschmidt Echo for a qubit coupled to an XY-spin chain environment.Published in:European Physical Journal B: Condensed Matter, 2012, v. 85, n. 5, p. 1, doi. 10.1140/epjb/e2012-21022-7By:Sharma, S.;Mukherjee, V.;Dutta, A.Publication type:Article