Tensor network scans reveal that the stationary spin entanglement entropy ridge follows population phase boundaries at small s but lacks the two-branch structure at large s in the sub-Ohmic spin-boson model.
Reviews of Modern Physics , volume =
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Low-order hybridization expansions fail in multi-orbital systems because the least correlated orbital suppresses correlation features across all orbitals through spurious couplings generated by the truncation.
An extension to the quantum regression theorem is derived via projection operators for variational polaron master equations, enabling accurate multi-time correlation functions in strongly coupled spin-boson models with memory effects.
The Lindblad equation is valid only within a finite time window controlled by the timescales of the bath, the system, and the rotating-wave approximation, with failure at early and late times.
A Lambda-type many-body quantum battery model shows collective charging and discharge suppression in the strong-coupling non-Markovian regime, with numerical simulations indicating that optimized driving and reservoir engineering enable rapid stable charging.
The paper summarizes A. O. Caldeira's foundational work on quantum Brownian motion, including dissipation in tunneling, alternative models, and links to decoherence and quantum thermodynamics.
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Entanglement structure of the dynamical phases in the sub-Ohmic spin-boson model
Tensor network scans reveal that the stationary spin entanglement entropy ridge follows population phase boundaries at small s but lacks the two-branch structure at large s in the sub-Ohmic spin-boson model.
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Validity and Limits of Low Order Hybridization Expansion Approaches for Multi-Orbital Systems
Low-order hybridization expansions fail in multi-orbital systems because the least correlated orbital suppresses correlation features across all orbitals through spurious couplings generated by the truncation.
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Beyond the Quantum Regression Theorem in Variational Polaron Master Equations with Low-Dimensional Baths
An extension to the quantum regression theorem is derived via projection operators for variational polaron master equations, enabling accurate multi-time correlation functions in strongly coupled spin-boson models with memory effects.
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Is Lindblad for me?
The Lindblad equation is valid only within a finite time window controlled by the timescales of the bath, the system, and the rotating-wave approximation, with failure at early and late times.
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Rapid and Stable Collective Charging and Discharge Suppression in Strongly Coupled Many-Body Quantum Batteries
A Lambda-type many-body quantum battery model shows collective charging and discharge suppression in the strong-coupling non-Markovian regime, with numerical simulations indicating that optimized driving and reservoir engineering enable rapid stable charging.
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Over forty years of research towards the understanding of Quantum Brownian Motion -- the contributions of A. O. Caldeira
The paper summarizes A. O. Caldeira's foundational work on quantum Brownian motion, including dissipation in tunneling, alternative models, and links to decoherence and quantum thermodynamics.