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SYNP: Symposium New Trends in Nonequilibrium Physics: Conservation Laws and Nonreciprocal Interactions

SYNP 1: New Trends in Nonequilibrium Physics: Conservation Laws and Nonreciprocal Interactions

SYNP 1.5: Invited Talk

Thursday, March 21, 2024, 17:15–17:45, H 0105

Chiral matters — •William Irvine — University of Chicago

The properties of materials, including their structure, shape, rheological response and mechanical stability arise spontaneously from the interactions between elementary building blocks. In passive materials these are often reciprocal, energy conserving and subject to thermal fluctuations. I will discuss the physics of out-of-equilibrium solids and fluids built out of mechanically spinning components. These active materials which blur the line between solid and fluid, spontaneously exhibit phenomena from chiral surface waves, to perling instabilities, to dislocation motility and crystal-whorl states. These rich and lively dynamics enable inference of the rheological properties of these odd materials which include odd stress, odd viscosity and odd elasticity. If time permits I will demonstrate how spinning fluids from within in three-dimensions, naturally leads to new effects, particularly at intermediate Reynolds numbers, when fluid inertia plays a role in dynamics.

Keywords: Odd elasticity and odd viscosity; Intermediate Reynolds number; Chiral active fluid and solid; Flocking