A number of recent experiments have used torsional oscillators to study the behavior of solid
helium. The oscillator frequencies increased at temperatures below 200 mK, an effect …

Supersolidity, the appearance of zero-viscosity flow in solids, was first indicated in helium-4
torsional oscillator (TO) experiments. In this apparatus, the irrotationality of the superfluid …

Macroscopic quantum properties of helium-4, one of the simplest and oldest elements in the
universe, continue to puzzle and amaze scientists. Supertransport in solid helium-4 is the …

Using a high-sensitivity torsional oscillator (TO) technique, we mapped the rotational and
relaxational dynamics of solid helium-4 (4He) throughout the parameter range of the …

The superflow in solid helium was detected by a decrease in the resonant period of a
torsional oscillator (TO) below 0.2 K. Recently, the shear modulus of solid helium has shown …

There are a number of distinct signatures of superfluids, one of which is the appearance of
quantized vortices. There have been some attempts to understand the putative supersolid …

We investigate the topological supersolid states of dipolar Fermi gases trapped in a spin-
dependent 2D optical lattice. Our results show that topological supersolid states can be …

We demonstrate that two amorphous solid states can exist in 4 He consisting of
distinguishable Boltzmann atoms under compressed conditions. The isothermal …

The rigid double-torus torsional oscillator (TO) is constructed to reduce any elastic effects
inherent to complicated TO structures, allowing explicit probing for a genuine supersolid …

The shear modulus of solid 4 He below 200 mK exhibits an unusual increase, the
characteristics of which show remarkable similarities to those of the period reduction in …