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Aref, T., Delsing, P., Kockum, M.K., Gustafson, M.V., Johansson, G., Leek, P., Magnusson, E. and Manenti, R. (2015) Quantum Acoustics with Surface Acoustic Waves.

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• TITLE: The Dissipative Flow in Topological Superconductors and Solid 4He

  AUTHORS: D. Schmeltzer

  KEYWORDS: Topological Superconductor, Stress, Strain, Ultrasound, Solid 4He

  JOURNAL NAME: Journal of Modern Physics, Vol.8 No.9, August 28, 2017

  ABSTRACT: Using two piezoelectric transducers, one measures the stress tensor response from the strain field generated by the second transducer. The ratio between the stress response and strain velocity determines the dissipative response. In the first part, we show that the dissipative stress response can be used for studying excitations in a topological superconductor. We investigate a topological superconductor for the case when an Abrikosov vortex lattice is formed. In this case, the Majorana fermions are dispersive, a fact that is used to compute the dissipative stress response. In the second part, we analyse the dissipative superfluid flow through solid 4He discoused recently. We identify low energy, an excitation which plays the role of the Majorana mode which is free to move in a direction perpendicular to the two dimensional plane spaces of the dislocations.