Polarization and entanglement spectrum in non-hermitian systems

Autor:	Ortega-Taberner, Carlos, Rødland, Lukas, Hermanns, Maria
Rok vydání:	2021
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Strongly Correlated Electrons
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.105.075103
Popis:	The entanglement spectrum is a useful tool to study topological phases of matter, and contains valuable information about the ground state of the system. Here, we study its properties for free non-Hermitian systems for both point-gapped and line-gapped phases. While the entanglement spectrum only retains part of the topological information in the former case, it is very similar to Hermitian systems in the latter. In particular, it not only mimics the topological edge modes, but also contains all the information about the polarization, even in systems that are not topological. Furthermore, we show that the Wilson loop is equivalent to the many-body polarization and that it reproduces the phase diagram for the system with open boundaries, despite being computed for a periodic system. Comment: 13 pages, 8 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2111.07788 Zobrazit plný text záznamu View this record from Arxiv