Rainbow chains and numerical renormalisation group for accurate chiral conformal spectra

Autor:	Szabó, Attila
Rok vydání:	2024
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Statistical Mechanics High Energy Physics - Theory Quantum Physics
Druh dokumentu:	Working Paper
Popis:	Based on the relationship between reduced and thermal density matrices in conformal field theory (CFT), we show that the entanglement spectrum of a conformal critical chain with exponentially decaying terms consists of conformal towers of the associated chiral CFT, with only weak finite-size effects. Through free-fermion and interacting examples, we show that these entanglement spectra present a reliable method to extract detailed CFT spectra from single wave functions without access to the parent Hamiltonian. We complement our method with a Wilsonian numerical renormalisation group algorithm for solving interacting, exponentially decaying chain Hamiltonians. Comment: 14+5 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2412.09685 Zobrazit plný text záznamu View this record from Arxiv