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Infrared Problem in Quantum Electrodynamics
Igor Frolov, Albert Schwarz
It is well known that the inclusive cross section in QED is infrared finite. In the standard diagram techniques this result follows from cancellation of infrared divergences. We su…
Geometric Approach to Quantum Theory. L-functionals
Albert Schwarz
This publication consists of slides from my talk at the Simons Center for Geometry and Physics in 2024. It contains a brief review of the L-functional formalism, along with a discu…
A new approach to superstring
Albert Schwarz
We show how starting with one-string space of states in BRST formalism one can construct a large class of physical quantities containing, in particular, scattering amplitudes for b…
A new approach to string theory
Albert Schwarz
In the present paper we consider quantum theories obtained by quantization of classical theories with first-class constraints assuming that these constraints form a Lie algebra. We…