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Topological acoustics.

Zhaoju Yang1, Fei Gao1, Xihang Shi1

  • 1Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore.

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|April 4, 2015
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Summary
This summary is machine-generated.

Researchers developed topological fluid acoustics to enable one-way sound propagation. This novel approach uses circulating fluids to create robust acoustic edge states, paving the way for advanced acoustic devices.

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Area of Science:

  • Fluid dynamics
  • Acoustics
  • Condensed matter physics

Background:

  • Acoustic wave manipulation has diverse applications, often paralleling optical technologies.
  • Topological edge states, a novel class of electromagnetic waves, exhibit robust one-way propagation without backscattering.
  • Existing acoustic devices lack this disorder-resilient unidirectional wave propagation.

Purpose of the Study:

  • To develop a theoretical framework for topological fluid acoustics.
  • To propose a practical method for realizing topological edge states in acoustic systems.
  • To explore the potential of disorder-free one-way sound propagation in acoustics.

Main Methods:

  • Theoretical modeling of acoustic wave propagation in fluids.
  • Designing acoustic structures incorporating circulating fluids.
  • Analyzing the properties of topological edge states in the proposed system.

Main Results:

  • Established an analogous theory of topological fluid acoustics.
  • Proposed a scheme for creating topological edge states using circulating fluids.
  • Demonstrated the potential for disorder-free one-way sound propagation.

Conclusions:

  • Topological fluid acoustics offers a new paradigm for controlling sound.
  • The proposed system enables robust, unidirectional acoustic wave propagation.
  • Potential applications include advanced acoustic isolators, modulators, and transducers.