High-order fidelity and quantum phase transition for the Heisenberg chain with next-nearest-neighbor interaction

Autor:	Wang, Li, Gu, Shi-Jian, Chen, Shu
Rok vydání:	2009
Předmět:	Quantum Physics
Druh dokumentu:	Working Paper
Popis:	In this article, we study the high order term of the fidelity of the Heisenberg chain with next-nearest-neighbor interaction and analyze its connection with quantum phase transition of Beresinskii-Kosterlitz-Thouless type happened in the system. We calculate the fidelity susceptibility of the system and find that although the phase transition point can't be well characterized by the fidelity susceptibility, it can be effectively picked out by the higher order of the ground-state fidelity for finite-size systems. Comment: 4 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0903.4242 Zobrazit plný text záznamu View this record from Arxiv