期刊
PHYSICAL REVIEW B
卷 105, 期 16, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.105.L161403
关键词
-
资金
- Science and Engineering Research Board (SERB), Government of India [STR/2019/000030]
- Ministry of Human Resource Development (MHRD), Government of India [STARS/APR2019/NS/226/FS]
This article investigates the use of nonlocal conductance spectroscopy and topological entanglement entropy in detecting topological phase transitions in topological superconductors. It is found that nonlocal conductance fails to detect phase transitions for shorter disordered nanowires, while topological entanglement entropy can signal a genuine transition.
Nonlocal conductance spectroscopy in three-terminal topological superconductor hybrid setups has been proposed as a way to conclusively detect topological phase transitions involving Majorana zero modes. Topological entanglement entropy is yet another way to gauge nonlocality in connection with the bulk-boundary correspondence of a topological phase. We show that while both the entanglement entropy and the nonlocal conductance exhibit a clear topological phase-transition signature for long enough pristine nanowires, nonlocal conductance fails to signal a topological phase transition for shorter disordered wires. While recent experiments have indeed shown premature gap-closing signatures in the nonlocal conductance spectra, we demonstrate that the entanglement entropy can indeed signal a genuine transition, regardless of the constituent nonidealities in an experimental situation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据