Simulations of the dynamics of quantum impurity problems with matrix product states
Source abstract
Abstract
The Anderson impurity model is a paradigmatic example in the study of strongly correlated quantum systems and describes an interacting quantum dot coupled to electronic leads. Here we investigate its dynamics following a quantum quench based on matrix product state simulations. We examine the behavior of its impurity magnetization. Its relaxation allows us to extract the predicted scaling of the Kondo temperature as a function of the impurity-lead hybridization and quantum dot repulsion. Additionally, our simulations provide estimates of the currents in the nonequilibrium quasisteady state appearing after the quench. Through their values, we examine the dependence of the conductance on the voltage bias ${V}b$ and on the impurity chemical potential ${V}g$, which displays a zero-bias Kondo peak. Our results are relevant for transport measurements in Coulomb blockaded devices, and, in particular, in quantum dots induced in nanowires.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Quantum and electron transport phenomena · Topological Materials and Phenomena · Quantum many-body systems
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Niels Bohr International Academy and Center for Quantum Devices, Niels Bohr Institute, Copenhagen University, Universitetsparken 5, 2100 Copenhagen, Denmark
Pitaevskii BEC Center and Department of Physics, University of Trento, Via Sommarive 14, I-38123 Trento, Italy
INFN-TIFPA, Trento Institute for Fundamental Physics and Applications, Via Sommarive 14, I-38123 Trento, Italy
Department of Physics, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
Center for Theoretical and Computational Physics, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan
Physics Division, National Center for Theoretical Sciences, Taipei 10617, Taiwan
Funding
Villum Fonden · Ministry of Science and Technology
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