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Paper detail

Parity breaking and scaling behavior in the spin-boson model

We study the breaking of parity in the spin-boson model and demonstrate unique scaling behavior of the magnetization and entanglement around the critical points for the parity breaking after suppressing the infrared divergence existing inherently in the spectral functions for Ohmic and sub-Ohmic dissipations. Our treatment is basically analytical and of generality for all types of the bath. We argue that the conventionally employed spectral function is not fully reasonable and the previous justification of quantum phase transition for localization needs to be more seriously reexamined.

preprint2012arXivOpen access
Tao LiuMang FengLei LiWanli YangKelin Wang
cond-mat.str-elquant-ph
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Tao LiuMang FengLei LiWanli YangKelin Wang

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