Orbital angular momentum and orbital dynamics: /sup 3/He-A and the Bose liquid

Journal Article · Tue Sep 01 04:00:00 EDT 1981 · Sov. Phys. - JETP (Engl. Transl.); (United States)

OSTI ID:5603860

Volovik, G E; Mineev, V P

General expressions for the superfluid current and the orbital angular momentum in a superfluid liquid with the structure of the A phase of /sup 3/He at T = 0 are derived which go over in the limit ..delta..>>epsilon-c/sub F/ into the corresponding expressions for a Bose liquid consisting of molecules with spin h1. It is shown that the local intrinsic angular momentum in /sup 3/He-A, unlike the corresponding quantity in a Bose liquid, is defined only in variations, and its spontaneous part is small on account of the smallness of (..delta../epsilon-c/sub F/)/sup 2/. The Lagrangian formalism is used to construct the nonlinear orbital dynamics of /sup 3/He-A at T = 0. It is shown that in the presence of textures in the l-vector field the dynamical equations are not Galilean invariant, which is another manifestation of the difference between /sup 3/He-A and a Bose liquid. The noninvariance stems from the fact that, because of the absence of a gap in the excitation spectrum, the nonsingular textures in /sup 3/He-A possess normal momenta, as a result of which the normal-component density is nonzero even at T = 0, and the velocity of the normal component does not drop out of the dynamical equations.

• Research Organization: L. D. Landau Institute of Theoretical Physics, Academy of Sciences of the USSR
• OSTI ID: 5603860
• Journal Information: Sov. Phys. - JETP (Engl. Transl.); (United States), Journal Name: Sov. Phys. - JETP (Engl. Transl.); (United States) Vol. 54:3; ISSN SPHJA
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSOLUTE ZERO TEMPERATURE
ANGULAR MOMENTUM
BOSE-EINSTEIN GAS
EVEN-ODD NUCLEI
FUNCTIONS
HELIUM 3
HELIUM 3 A
HELIUM ISOTOPES
ISOTOPES
LAGRANGIAN FUNCTION
LIGHT NUCLEI
NUCLEI
ORBITAL ANGULAR MOMENTUM
STABLE ISOTOPES
SUPERFLUIDITY