子空间内非弹性散射对子空间间隧穿的阻断
Blocking of inter-subspace tunneling by intra subspace inelastic scattering
摘要:
近年来,粒子与环境相互作用的内禀退相干和退相位的概念得到了广泛的研究。这对非相干c轴电阻率和高温超导性之间看似合理的因果关系有着重要的影响。在我们的工作中,我们研究了两个位置之间隧穿粒子的隧穿抑制和非相干运动。玻色子激发的环境耦合到只有一个网站诱导现场自旋翻转。我们表明,这种现场自旋翻转散射使隧道运动不相干。在高温极限下,计算了非相干速率或跳跃速率。我们还简要地讨论了零温下环境耦合对有效隧穿的重正化,遵循Wegner的重整化群方法。
英文摘要:
In recent years the notion of intrinsic decoherence and dephasing of a particle interacting with its environment is being investigated intensively. This has an important bearing on a plausible causal connection between incoherent c-axis resistivity and high-temperature superconductivity. In our work we study the tunnel supression and incoherent motion of a particle tunneling between two sites. The bosonic excitations of the environment are coupled to only one site inducing on-site spin flips. We show that this on-site spin flip scattering makes the tunnel motion incoherent. In the high-temperature limit incoherent rate or hopping rate has been calculated. We also briefly discuss the renormalization of the effective tunneling by environmental coupling at zero temperature following Wegner's renormalization group procedure.
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