Replacing energy by von Neumann entropy in quantum phase transitions |
| |
Authors: | Angela Kopp |
| |
Institution: | Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, CA 90095-1547, USA |
| |
Abstract: | We propose that quantum phase transitions are generally accompanied by non-analyticities of the von Neumann (entanglement) entropy. In particular, the entropy is non-analytic at the Anderson transition, where it exhibits unusual fractal scaling. We also examine two dissipative quantum systems of considerable interest to the study of decoherence and find that non-analyticities occur if and only if the system undergoes a quantum phase transition. |
| |
Keywords: | Quantum phase transition and criticality Entanglement Dissipative quantum system Von Neumann entropy Anderson localization Nonanalyticity of free energy |
本文献已被 ScienceDirect 等数据库收录! |