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arXiv 0802.2303cond-mat.str-elcond-mat.stat-mech
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模糊量子相变理论

Theory of smeared quantum phase transitions

J. A. Hoyos, Thomas Vojta

摘要:

本文提出了耗散无规横场伊辛链量子相变的强无序重整化群理论。对于欧姆耗散,我们解析地求解重整化流方程,得到系统低温特性的渐近精确结果。我们发现,量子涨落和欧姆耗散之间的相互作用破坏了量子临界点的涂抹。我们还确定了相图和观察量的行为在附近的涂抹量子相变。

英文摘要:

We present an analytical strong-disorder renormalization group theory of the quantum phase transition in the dissipative random transverse-field Ising chain. For Ohmic dissipation, we solve the renormalization flow equations analytically, yielding asymptotically exact results for the low-temperature properties of the system. We find that the interplay between quantum fluctuations and Ohmic dissipation destroys the quantum critical point by smearing. We also determine the phase diagram and the behavior of observables in the vicinity of the smeared quantum phase transition.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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