NON-LOCAL QUADRATIC ACTIONS

The following sections are included:

• Elimination of Degrees of Freedom

  • System coupled to a harmonic oscillator

  • An Electron in a random potential

• Two-time Quadratic Actions

• Extension to More General Non-local Actions

• Examples of Explicit Evaluation

  • Generalized one-time actions

  • Transiationally invariant two-time actions

  • Propagator for the polaron kernel

• Applications of Two-time Quadratic Actions

  • Exactly solvable model of electronic density of states (DOS)

  • Polymer distribution functions

  • Propagation of waves in random media

• Notes and References