Effective Modeling of Open Quantum Systems by Low-rank Discretization of Structured Environments
arXiv:2407.18880 · doi:10.1063/5.0232232
Abstract
The accurate description of the interaction of a quantum system with a its environment is a challenging problem ubiquitous across all areas of physics, and lies at the foundation of quantum mechanics theory. Here we pioneer a new strategy to create discrete low-rank models of the system-environment interaction, by exploiting the frequency and time domain information encoded in the fluctuation-dissipation relation connecting the system-bath correlation function and the spectral density. We demonstrate the effectiveness of our methodology by combining it with tensor-network methodologies and simulating the quantum dynamics of a complex excitonic systems in a highly structured bosonic environment. The new modeling framework sets the basis for a leap in the analysis of open quantum systems providing controlled accuracy at significantly reduced computational costs, with benefits in all connected research areas.
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Cited by in corpus (4)
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- Comparison between explicit and implicit discretization strategies for a dissipative thermal environment
- Reduced Density Matrices and Phase-Space Distributions in Thermofield Dynamics
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