We study the drag force on objects moving in a Fermi superfluid at velocities on the order of
the Landau velocity v L. The expectation has been that v L is the critical velocity beyond …

The Fermi-liquid theory formulated by Landau is a basic paradigm of the behavior of an
interacting many-body system. We present a new application of this theory to calculate the …

We use Fermi liquid theory to study the mechanical impedance of He 3-He 4 mixtures at low
temperatures. The theory is applied to the case of vibrating wires, immersed in the liquid. We …

We write the basic equations of Fermi-liquid theory for mixtures of fermions and bosons, an
example being He 3-He 4 mixtures at low temperatures. Basically the theory is identical to …

We study linearized kinetic equations describing mixtures of 3 He and 4 He at such low
temperatures, that all of 4 He is superfluid. The 3 He part is described by Landau's Fermi …

We discuss the drag force exerted on a high porosity aerogel in liquid 3 He and its effect on
sound propagation. The drag force is governed by distinct laws depending on the Knudsen …

Original papers Original papers are not included in the electronic version of the dissertation.
Kuorelahti, JA, Tuorila, JA, & Thuneberg, EV (2016). Fermi liquid theory applied to a film on …