论文标题
量子隧穿中的耗散浆果相效应
Dissipative Berry phase effect in quantum tunneling
论文作者
论文摘要
浆果相效应在许多中尺度缩合物质和量子化学系统中起着核心作用，这些物质自然受到耗散的环境影响。我们提出并在微观上提出了围绕单极或圆锥电位相交的典型量子相干隧道模型，以解决耗散和拓扑上非平凡的浆果相之间有趣但被忽视的相互作用。我们采用对称分析和准确的数值解决方案采用激体顿方法，这些方法始终融合了非扰动耗散和浆果阶段。它揭示了具有浆果相效应的新型耗散量子干扰现象。该隧道的相图表现出KRAMERS退化性，对耗散的非单调依赖性以及量子干扰的一般耗散驱动的相变，在此之前，量子隧道的非常规耗散增强的状态持续存在。
Berry phase effect plays a central role in many mesoscale condensed matter and quantum chemical systems that are naturally under the environmental influence of dissipation. We propose and microscopically derive a prototypical quantum coherent tunneling model around a monopole or conical potential intersection in order to address the intriguing but overlooked interplay between dissipation and topologically nontrivial Berry phase effect. We adopt the instanton approach with both symmetry analysis and accurate numerical solutions that consistently incorporate nonperturbative dissipation and Berry phase. It reveals a novel dissipative quantum interference phenomenon with Berry phase effect. The phase diagram of this tunneling exhibits Kramers degeneracy, nonmonotonic dependence on dissipation and a generic dissipation-driven phase transition of quantum interference, before which an unconventional dissipation-enhanced regime of quantum tunneling persists.
