Introductory statement

Papers on semiclassical approximations

• Kiev conference presentation, 1995
• Spectral oscillations, periodic orbits, and scaling, published with slight revisions as J. Phys. A 35, 4049-4066 (2002)
• Naples conference presentation, 2001 (summary of "Spectral Oscillations ..." plus comments on the relation with vacuum energy), Nucl. Phys. B (Proc. Suppl.) 104, 161-164 (2002)
• WKB approximation to the power wall, J. Phys. A 46 (2013) 195302
• WKB for a linear potential and a ceiling, J. Phys. A 50 (2017) 105303

• Todd Zapata's M.S. thesis
• Undergraduate seminar on application of a cubic equation to the bouncing ball problem

See also Eigenfunction expansions and Vacuum energy.