# Exact result for the force autocorrelation in the rotating-wave approximation

## Document Type

Article

## Publication Date

1-1-2000

## Abstract

One of the cornerstones of many areas of physics (such as quantum optics, laser theory, and cavity QED) is the rotating-wave approximation (RWA) to the Hamiltonian for a dipole-oscillator coupled to the radiation field. Here it is shown that within the RWA one can obtain explicitly an exact expression for the autocorrelation of the force exerted by the field on the oscillator. This exact result differs from that appearing in much of the standard literature in that the spectrum is not that of white noise and there is no nontrivial dependence on the oscillator frequency.

## Publication Source (Journal or Book title)

Physical Review A - Atomic, Molecular, and Optical Physics

## First Page

221101

## Last Page

221104

## Recommended Citation

Ford, G., & O'Connell, R.
(2000). Exact result for the force autocorrelation in the rotating-wave approximation.* Physical Review A - Atomic, Molecular, and Optical Physics**, 61* (2), 221101-221104.
Retrieved from https://repository.lsu.edu/physics_astronomy_pubs/3921