Dissipative Berry phase effect in quantum tunneling
- URL: http://arxiv.org/abs/2004.08986v2
- Date: Tue, 29 Dec 2020 02:17:34 GMT
- Title: Dissipative Berry phase effect in quantum tunneling
- Authors: Xiao-Xiao Zhang and Naoto Nagaosa
- Abstract summary: Berry phase effect plays a central role in many mesoscale condensed matter and quantum chemical systems.
We derive a quantum coherent tunneling model around a monopole or conical potential intersection.
It reveals a novel dissipative quantum interference phenomenon with Berry phase effect.
- Score: 1.0152838128195465
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: 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.
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