Momentum deficit in quantum glasses

Abstract

Using the concept of tunneling two level systems we explain the reduction of rotational inertia of disordered solid 4He observed in the torsional oscillator experiments. The key point is a peculiar quantum phenomenon of momentum deficit for two level systems in moving solids. We show that an unusual state which is essentially different from both normal and superfluid solid states can be realized in quantum glasses. This state is characterized by reduced rotational inertia in oscillator experiments, by absence of a superflow, and by normal behavior in steady rotation.

References in corpus (5)

• Disorder and the Supersolid State of Solid ${}^4$He
• What makes a crystal supersolid ?
• Pressure-driven flow of solid helium
• Freezing and pressure-driven flow of solid helium in Vycor
• Probing the Upper Limit of Nonclassical Rotational Inertia

Cited by in corpus (8)

• Evidence for a High-Temperature Disorder-Induced Mobility in Solid ${}^4$He
• A glass anomaly in the shear modulus of solid ${}^4$He
• Effects of ${}^3$He Impurity on Solid ${}^4$He Studied by Compound Torsional Oscillator
• The glassy response of double torsion oscillators in solid Helium-4
• Shear modulus in viscoelastic solid ${}^4$He
• Defects and glassy dynamics in solid He-4: Perspectives and current status
• BCC vs. HCP - The Effect of Crystal Symmetry on the High Temperature Mobility of Solid ${}^4$He
• The role of glass dynamics in the anomaly of the dielectric function of solid helium