Bridging the gap between topological non-Hermitian physics and open quantum systems

2022-07-25T20:22:00+02:00Tags: |

Authors: Gomez-Leon, Alvaro; Ramos, Tomas; Gonzalez-Tudela, Alejandro; Porras, Diego Journal: PHYSICAL REVIEW A Publication date: 2022/07/25 DOI: 10.1103/PhysRevA.106.L011501 Abstract: We relate observables in open quantum systems with the topology of non-Hermitian models using the Keldysh path-integral method. This allows to extract an effective Hamiltonian from the Green's function which contains all the relevant topological information [...]

Exceptional spectral phase in a dissipative collective spin model

2022-07-07T20:22:00+02:00Tags: |

Authors: Rubio-Garcia, Alvaro; Corps, Angel L.; Relano, Armando; Molina, Rafael A.; Perez-Bernal, Francisco; Enrique Garcia-Ramos, Jose; Dukelsky, Jorge Journal: PHYSICAL REVIEW A Publication date: 2022/07/07 DOI: 10.1103/PhysRevA.106.L010201 Abstract: We study a model of a quantum collective spin weakly coupled to a spin-polarized Markovian environment and find that the spectrum is divided into two regions that [...]

Go to Top