Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 119, Issue 42, Pages -Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.2201279119
Keywords
active chiral matter; Hall-like flow; viscosity; collective behavior
Categories
Funding
- National Natural Science Foundation of China [11874397, 11674365, 11774394]
- Key Research Program of Frontier Sciences of the Chinese Academy of Sciences [12034019]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB33000000]
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Broken time-reversal and parity symmetries in active spinner fluids lead to a nondissipative odd viscosity, resulting in phenomena not achievable in traditional passive or active fluids. Our study demonstrates that the odd viscosity itself can cause a Hall-like transport when the active chiral fluid flows through a quenched matrix of obstacles, resembling an anomalous Hall effect. The Hall-like velocity depends on spinner activity and longitudinal flow due to the interplay between odd viscosity and spinner-obstacle collisions.
Broken time-reversal and parity symmetries in active spinner fluids imply a nondissi-pative odd viscosity, engendering phenomena unattainable in traditional passive or active fluids. Here we show that the odd viscosity itself can lead to a Hall-like transport when the active chiral fluid flows through a quenched matrix of obstacles, reminiscent of the anomalous Hall effect. The Hall-like velocity depends significantly on the spinner activity and longitudinal flow due to the interplay between odd viscosity and spinner-obstacle collisions. Our findings underscore the importance of odd viscosity in active chiral matter and elucidate its essential role in the anomalous Hall-like effect.
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