Projects per year
Abstract
Chiral edge states can transmit energy along imperfect interfaces in a topologically robust and unidirectional manner when protected by bulk-boundary correspondence. However, in continuum systems, the number of states at an interface can depend on boundary conditions. Here we design interfaces that host a net flux of the number of modes into a region, trapping incoming energy. As a realization, we present a model system of two topological fluids composed of counter-spinning particles, which are separated by a boundary that transitions from a fluid-fluid interface into a no-slip wall. In these fluids, chiral edge states disappear, which implies non-Hermiticity and leads to an interplay between topology and energy dissipation. Solving the fluid equations of motion, we find explicit expressions for the disappearing modes. We then conclude that energy dissipation is sped up by mode trapping. Instead of making efficient waveguides, our paper shows how topology can be exploited for applications towards acoustic absorption, shielding, and soundproofing.
Original language | English |
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Article number | 014603 |
Journal | Physical Review E |
Volume | 104 |
Issue number | 1 |
DOIs | |
Publication status | Published - 9 Jul 2021 |
Bibliographical note
Funding Information:P.A.M. gratefully acknowledges support through the Royal Society Project No. IECR2170195. A.S. gratefully acknowledges the support of the Engineering and Physical Sciences Research Council through New Investigator Grant No. EP/T000961/1.
ASJC Scopus subject areas
- Statistical and Nonlinear Physics
- Statistics and Probability
- Condensed Matter Physics
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Dive into the research topics of 'Complete absorption of topologically protected waves'. Together they form a unique fingerprint.Projects
- 1 Finished
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Designing soft engines and active solids
Souslov, A. (PI)
Engineering and Physical Sciences Research Council
2/03/20 → 30/09/23
Project: Research council