Relativistic Fluctuations and Anomalous Darwin Terms in Superconductors

Abstract

The anomalous Darwin term, one of the recently derived relativistic corrections to the conventional theory of superconductivity, is analysed in detail. A new derivation of this term, much simpler than that given originally, is presented and used to interpret the term physically, in terms of fluctuations of the relativistic wave packet describing the paired electrons. Several puzzling features of the original derivation find a simple explanation in terms of this reinterpretation. The question of observability of the anomalous Darwin term, and its relation to the conventional Darwin term and to earlier proposed superconducting Darwin terms are also discussed.

Cited by in corpus (8)

• Position and spin in relativistic quantum mechanics
• BCS and generalized BCS superconductivity in relativistic quantum field theory. I. formulation
• BCS and Generalized BCS Superconductivity in Relativistic Quantum Field Theory. II. Numerical Calculations
• Zitterbewegung of bosons
• Quantum mechanics of fermion confined to a curved surface in Foldy-Wouthuysen representation
• Spin currents, relativistic effects and the Darwin interaction in the theory of hole superconductivity
• Condensation energy of the homogeneous electron gas from the density functional theory for superconductors
• Normal state quantum geometry, non-locality and superconductivity