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Ground-state instabilities and entanglement in the spin-boson model

โœ Scribed by Ru-Fen Liu; Chia-Chu Chen


Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
281 KB
Volume
374
Category
Article
ISSN
0378-4371

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An expression of the ground state energy E SB of the spin-boson Hamiltonian H SB is considered. The expression in the cases of both massive and massless bosons is given by a nonperturbative method. By using the expression, we show a necessary and sufficient condition with respect to a parameter G #

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A generalization of the standard spin-boson model is considered. The Hamiltonian H(:) of the model with a coupling parameter : # R acts in the tensor product H F b of a Hilbert space H and the boson (symmetric) Fock space F b over L 2 (R & ). The existence and uniqueness of ground states of H(:) are