• Corpus ID: 248665726

Non-equilibrium quantum impurity problems via matrix-product states in the temporal domain

@inproceedings{Thoenniss2022NonequilibriumQI,
  title={Non-equilibrium quantum impurity problems via matrix-product states in the temporal domain},
  author={Julian Thoenniss and Alessio Lerose and Dmitry A. Abanin},
  year={2022}
}
Describing a quantum impurity coupled to one or more non-interacting fermionic reservoirs is a paradigmatic problem in quantum many-body physics. While historically the focus has been on the equilibrium properties of the impurity-reservoir system, recent experiments with mesoscopic and cold-atomic systems enabled studies of highly non-equilibrium impurity models, which require novel theoretical techniques. We propose an approach to analyze impurity dynamics based on the matrix-product state… 
1 Citations
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Inspired by the Kotelnikov sampling theorem from the theory of classical bandlimited signals, the idea that the real-time dissipative quantum motion has a natural structure of a discrete-time matrix product state, with a bounded bond dimension is explored and yields a microscopically derived collision model.

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