INIFTA 05425
INSTITUTO DE INVESTIGACIONES FISICO-QUIMICAS TEORICAS Y APLICADAS
Unidad Ejecutora - UE
artículos
Título:
Comment on "study of counterintuitive transport properties in the Aubry-André-Harper model via entanglement entropy and persistent current"
Autor/es:
ALCOBA, DIEGO R.; OÑA, OFELIA B.; TORRE, ALICIA; RÍOS, ELIAS; FERNÁNDEZ, FRANCISCO M.; LAIN, LUIS
Revista:
Physical Review B
Editorial:
American Physical Society
Referencias:
Año: 2020 vol. 101
ISSN:
2469-9950
Resumen:
In a recent study of the transport properties in the Aubry-André-Harper model [Phys. Rev. B 100, 195143 (2019)2469-995010.1103/PhysRevB.100.195143], the authors point out the failure of the Hellmann-Feynman theorem (HFT) in the case of degenerate states. They try to support such a statement from earlier papers that prove exactly the opposite. It appears that the application of the HFT to degenerate states has not been well understood. For this reason, in this Comment we illustrate the correct application of the HFT to the model just mentioned.
