Fidelity susceptibility and Loschmidt echo for generic paths in a three-spin interacting transverse Ising model

作者：Rajak Atanu^*; Divakaran Uma

来源：Journal of Statistical Mechanics: Theory and Experiment , 2014, 2014(4): P04023.

DOI：10.1088/1742-5468/2014/04/P04023

• spin chains
• ladders and planes (theory)
• quantum phase transitions (theory)
• entanglement in extended quantum systems (theory)

We study the effect of the presence of different types of critical points,such as ordinary critical points, multicritical points and quasicritical points, along different paths on the fidelity susceptibility and Loschmidt echo of a three-spin interacting transverse Ising chain using a method that does not involve the language of tensors. We find that the scaling of the fidelity susceptibility and Loschmidt echo with the system size at these special critical points of the model studied is in agreement with the known results, thus supporting our method.

• 出版日期2014-4