Semiclassical analysis of low lying elgenvalues. III. Width of the ground state band in strongly coupled solids

Semiclassical analysis of low lying eige

Semiclassical analysis of low lying eigenvalues. III. Width of the ground state band in strongly coupled solids: Barry Simon. Division of Mathematics, Physics and Astronomy, California Institute of Technology, Pasadena, California 91125

📂 Article 📅 1984 🏛 Elsevier Science 🌐 English ⚖ 37 KB

The known operator solution of the massless Schwinger model is used to calculate exactly, in three operator product expansions, the coefficient functions of the first few operators of low dimension which contribute when vacuum matrix elements are to be taken. A comparison of the results provides a t