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Quantum phase transition in the sub-Ohmic spin-boson model

From coherent motion to localization: II. Dynamics of the spin-boson model with sub-Ohmic spectral density at zero temperature

Quench of non-Markovian coherence in the deep sub-Ohmic spin–boson model: A unitary equilibration scheme

On the spin-boson model with a sub-ohmic bath

Spin Path Integrals, Berry Phase, and the Quantum Phase Transition in the Sub-Ohmic Spin-Boson Model

Equilibrium correlation functions of the spin-boson model with sub-Ohmic bath