Quantum nanofriction in trapped ion chains with a topological defect
- URL: http://arxiv.org/abs/2108.07635v1
- Date: Tue, 17 Aug 2021 13:57:11 GMT
- Title: Quantum nanofriction in trapped ion chains with a topological defect
- Authors: L. Timm, L. A. R\"uffert, H. Weimer, L. Santos, T. E. Mehlst\"aubler
- Abstract summary: A topological defect is created in a zigzag ion Coulomb crystal, which results in an Aubry transition from free sliding to pinned phase as a function of the trap aspect ratio.
We demonstrate the relevance of quantum tunneling in a finite range of aspect ratios close the critical point, showing that the quantum effects may be observed in the kink dynamics for sufficiently low temperatures.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Trapped ion systems constitute a well controllable scenario for the study and
emulation of nanofriction, and in particular of Frenkel-Kontorova-like models.
This is in particular the case when a topological defect is created in a zigzag
ion Coulomb crystal, which results in an Aubry transition from free sliding to
pinned phase as a function of the trap aspect ratio. We explore the quantum
effects of the Aubry transition by means of an effective simplified model, in
which the defect is treated like a single quantum particle that experiences an
effective Peierls-Nabarro potential and a position-dependent mass. We
demonstrate the relevance of quantum tunneling in a finite range of aspect
ratios close the critical point, showing that the quantum effects may be
observed in the kink dynamics for sufficiently low temperatures. Finally, we
discuss the requirements to reveal quantum effects at the Aubry transition in
future experiments on trapped ions.
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