Variational approach to the dynamics of dissipative quantum impurity models
Simulating dissipative quantum many-body systems presents a significant theoretical challenge. Here, the authors develop an efficient nonperturbative framework that is tailored to dissipative impurity problems, combining a superposition of Gaussian states (SGS) variational ansatz with the quantum trajectory approach. They showcase the method with a model of a spinful impurity subject to two-body losses embedded in a fermionic bath, for which they explore the full crossover from weak to strong dissipation. Their approach captures the emergence of a loss-induced Kondo effect under strong dissipation, and reveals an exotic negative conductance phenomenon at intermediate loss rates.
Authors
- Tilman Esslinger (ORCID: https://orcid.org/0000-0002-8333-107X)
- Martino Stefanini (ORCID: https://orcid.org/0000-0002-8095-9603)
- Jamir Marino (ORCID: https://orcid.org/0000-0003-2585-2886)
- Sarang Gopalakrishnan (ORCID: https://orcid.org/0000-0002-7493-7600)
- Eugene Demler (ORCID: https://orcid.org/0000-0002-2499-632X)
- Yi-Fan Qu (ORCID: https://orcid.org/0000-0003-2251-3352)
- Tao Shi (ORCID: https://orcid.org/0000-0001-8487-2479)
Institutions
- Johannes Gutenberg University Mainz (DE)
- Princeton University (US)
- ETH Zurich (CH)
- Institute of Theoretical Physics (CN)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- Physical review. B./Physical review. B
- Published
- 2025-04-08
- DOI
- https://doi.org/10.1103/physrevb.111.155113
- Citations
- 9
- Primary Topic
- Quantum and electron transport phenomena
- Type
- article
- Field-Weighted Citation Impact
- 11.22
Funders
- Deutsche Forschungsgemeinschaft
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
- Eidgenössische Technische Hochschule Zürich
- Army Research Office