Entanglement between a qubit and the environment in the spin-boson model
Data(s) |
01/09/2003
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Resumo |
The quantitative description of the quantum entanglement between a qubit and its environment is considered. Specifically, for the ground state of the spin-boson model, the entropy of entanglement of the spin is calculated as a function of α, the strength of the ohmic coupling to the environment, and ɛ, the level asymmetry. This is done by a numerical renormalization group treatment of the related anisotropic Kondo model. For ɛ=0, the entanglement increases monotonically with α, until it becomes maximal for α→1-. For fixed ɛ>0, the entanglement is a maximum as a function of α for a value, α=αM |
Identificador |
http://espace.library.uq.edu.au/view/UQ:13329/UQ13329_OA.pdf |
Idioma(s) |
eng |
Publicador |
Americal Physical Society |
Palavras-Chave | #Condensed matter physics #Spin-boson model #Optics #Physics, Atomic, Molecular & Chemical #Dissipative 2-state System #Renormalization-group #Error condition detected #Josephson-junction #Magnetic-alloys #Anderson Model #Quantum-state #Dynamics #Entropy |
Tipo |
Journal Article |