Coherent transient effects in Josephson junctions. Formulation

Journal Article · Sun Oct 01 04:00:00 EDT 1978 · Phys. Rev., B: Solid State; (United States)

DOI:https://doi.org/10.1103/PhysRevB.18.3231· OSTI ID:6850813

Rogovin, D; Scully, M; DiRienzo, A

Coherent transient phenomena in superconducting tunnel junctions are investigated by means of a Gorkov-Nambu, Green's-function formulation, but without making the usual factorization. In this way we are led to and justify a pseudospin-angular-momentum formulation of junction dynamics. We find that for problems involving pair-current flow between weakly coupled superconductors the system can be conveniently represented by its position on a Bloch sphere in our pseudospin space. The magnitude of the Bloch vector is set by the total number of interacting Cooper pairs whereas its orientation is specified by two angles, theta and phi. The angle phi is the usual Josephson-pair phase, but the new angle theta enters our calculations for transient situations. A comparison is made between the present angular-momentum formulation and the phenomenological number--phase-angle theory.

• Research Organization: Science Applications, Incorporated, 1200 Prospect Street, La Jolla, California 92037
• OSTI ID: 6850813
• Journal Information: Phys. Rev., B: Solid State; (United States), Journal Name: Phys. Rev., B: Solid State; (United States) Vol. 18:7; ISSN PLRBA
• Country of Publication: United States
• Language: English

Related Subjects

656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COOPER PAIRS
CORRELATED-PARTICLE MODELS
FUNCTIONS
GREEN FUNCTION
JOSEPHSON JUNCTIONS
MATHEMATICAL MODELS
PARTICLE MODELS
SUPERCONDUCTING JUNCTIONS
TRANSIENTS
TUNNEL EFFECT