RT Journal Article
T1 Comment on "Revisiting the phase transitions of the Dicke model"
A1 Corps, Angel L.
A1 Relaño Pérez, Armando
AB In the work of Das and Sharma [Phys. Rev. A 105, 033716 (2022)] the phase transitions of the Dicke model are studied. Its main result is that, besides the well-known quantum phase transition, excited-state quantum phase transition, and thermal phase transition exhibited by the model, there exists an upper bound energy E* beyond which the model ceases to exhibit quantum chaotic behavior and the structure of the eigenfunctions changes. Based on this finding, a number of well-established results about the Dicke model are called into question. We argue that this result and all its consequences are spurious numerical effects resulting from an improper truncation of the infinite-dimensional Hilbert space necessary for numerical diagonalization.
PB Amer Physical Soc
SN 2469-9926
YR 2022
FD 2022-10-13
LK https://hdl.handle.net/20.500.14352/72944
UL https://hdl.handle.net/20.500.14352/72944
LA eng
NO ©2022 American Physical Society. This work has been supported by the Spanish Grant No. PGC-2018-094180-B-I00 funded by Ministerio de Ciencia e Innovación/Agencia Estatal de Investigación MCIN/AEI/10.13039/501100011033 and FEDER “A way of making Europe.” A.L.C. acknowledges financial support from “la Caixa” Foundation (ID 100010434) through the fellowship LCF/BQ/DR21/11880024.
NO Ministerio de Ciencia e Innovación/Agencia Estatal de Investigación
NO MCIN/AEI
NO FEDER
NO "la Caixa" Foundation
DS Docta Complutense
RD 6 abr 2025