John Reppy

John L. Wetherill Professor of Physics Emeritus


Low temperature phyiscs; bose condensation; critical phenomena; superfluidity in 4He, 3He and supersolids; low dimensional systems; space science

Research Focus

The main interest of our group is directed toward an understanding of the macroscopic quantum properties of superfluid 3He, 4He, and the super solid state of solid 4He. The problems of Bose-Einstein condensation, inhomogeneous superfluid boundary conditions and the study of phase transitions in systems of reduced dimensionality are current research topics of my group. Persistent current studies, torsional oscillator measurements, nano kelvin thermometry, and propagation of 3rd and 4th sound are examples of the various experimental techniques used in this work. The group has a close association with those of Professors Lee and Parpia.

Our group will consider a new graduate student.