Antiresonant driven systems for particle manipulation

TL;DR

This paper explores anti-resonant phenomena in mass transport systems driven by complex forces, demonstrating how these effects can be harnessed for particle sorting and manipulation in nano-scale applications.

Contribution

It introduces the concept of anti-resonances in driven transport systems and analyzes their role in particle manipulation within deformable, confined environments.

Findings

Anti-resonances occur due to coupling of multiple space-time modes.

Flexible channels induce entropic forces affecting transport.

Anti-resonance phenomena can be used to optimize particle sorting.

Abstract

We report on the onset of anti-resonant behaviour of mass transport systems driven by time-dependent forces. Anti-resonances arise from the coupling of a sufficiently high number of space-time modes of the force. The presence of forces having a wide space-time spectrum, a necessary condition for the formation of an anti-resonance, is typical of confined systems with uneven and deformable walls that induce entropic forces dependent on space and time. We have analyzed, in particular, the case of polymer chains confined in a flexible channel and shown how they can be sorted and trapped. The presence of resonance-antiresonance pairs found can be exploited to design protocols able to engineer optimal transport processes and to manipulate the dynamics of nano-objects.