"Odd viscosity": laboratory validation of a new quantum

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Viscosity, the analogue of friction in fluid dynamics, is dissipative in general but it differs in systems that have broken time-reversal symmetry, such as in some quantum fluids. In 1995 Avron, Seiler, and Zograf showed that the viscosity tensor of quantum fluids at zero temperature with an energy gap has an antisymmetric part which is entirely dissipationless, also known as "odd" or Hall viscosity. The Hall viscosity is a bulk property for which little is known. Furthermore, experimental measurements of Hall viscosity in quantum Hall states have, until now, been left untouched and remain an outstanding problem due to their complexity. This is the main objective of this work: to experimentally confirm the existence of "odd viscosity" and provide and experimental proof for an entirely new quantum. To do so, we have forged a partnership together with the FSU's national high magnetic field laboratory and we will make use of the GervaisLab unique expertise with ultra-high mobility electronic devices and Engel's their world-leading expertise with high-magnetic field capabilities to proof the existence of this entirely new quantum concept.