Concerning the nature of the lambda-transition order parameter

Journal Article · Sat Oct 01 00:00:00 EDT 1983 · Sov. Phys. - JETP (Engl. Transl.); (United States)

OSTI ID:6794680

Nepomnyashchii, Y A

It is shown on the basis of an analysis of the equation ..sigma../sub 12/ = 0 (A. A. Nepomnyashchii and Yu. A. Nepomnyashchii, JETP Lett. 21, 1 (1975); Sov. Phys. JETP 48, 493 (1978)) that the nonzero c-number component = psi (the condensate wave function) of the initial field operator psi-circumflex, while involved in the criterion for superfluid ordering, is not the quantity that characterizes the field aspects of the macroscopic motion of the superfluid, and can be used as the order parameter in the effective Hamiltonian of the lambda-transition theory. The variable characterizing the analogy between the superfluid state (of the superfluid's long-wave coherent subsystem) and a classical field with a nonsingular pair Hamiltonian is the c component = psi-tilde (the ''macroscopic wave function'') of some ''effective'' field operator psi-tilde, a component which corresponds to the choice Vertical Barpsi-tildeVertical Bar = ( rho/sub s//m)/sup 1//sup ///sup 2/, which is in fact realized in the Ginzburg-Pitaevskii theory in both its original (V. I. Ginzburg and L. P. Pitaevskii, Sov. Phys. JETP 7, 858 (1958); L. P. Pitaevskii, Sov. Phys. JETP 8, 282 (1959)) and modified (V. L. Ginzburg and A. A. Sobyanin, Sov. Phys. Usp. 19, 773 (1976)) form.

• Research Organization: Perm' State University
• OSTI ID: 6794680
• Journal Information: Sov. Phys. - JETP (Engl. Transl.); (United States), Vol. 58:4
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
SUPERFLUIDITY
FIELD THEORIES
ORDER PARAMETERS
HAMILTONIANS
LAMBDA POINT
SYMMETRY BREAKING
MATHEMATICAL OPERATORS
PHYSICAL PROPERTIES
QUANTUM OPERATORS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
640450* - Fluid Physics- Superfluidity