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- W2977485802 abstract "We analyze the quantum mechanics of the friction experienced by a small system as it moves nondestructively with velocity $v$ over a surface. Specifically, we model the interactions between the system and the surface with a collision model. We show that under weak assumptions, the magnitude of the friction induced by this interaction decreases as $1/v$ for large velocities. Specifically, we predict that this phenomenon occurs in the Zeno regime, where each of the system's successive couplings to subsystems of the surface is very brief. In order to investigate the friction at low velocities and with velocity-dependent coupling strengths, we motivate and develop one-dimensional convex collision models. Within these models, we obtain an analytic expression for the general friction-velocity dependence. We are thus able to exactly determine the conditions under which the usual friction-velocity dependency arises. Finally, we give examples that demonstrate the possibility, in principle, of antifriction, in which case the system is accelerated by its interaction with the surface, a phenomenon associated with active materials and inverted level populations." @default.
- W2977485802 created "2019-10-10" @default.
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- W2977485802 date "2019-10-02" @default.
- W2977485802 modified "2023-09-27" @default.
- W2977485802 title "Zeno friction and antifriction from quantum collision models" @default.
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- W2977485802 doi "https://doi.org/10.1103/physreva.100.042702" @default.
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