Fluctuations of the Casimir-Polder force between an atom and a conducting wall

Details Fluctuations of the Casimir-Polder force between an atom and a conducting wall Fluctuations of the Casimir-Polder force between an atom and a conducting wall

2007-06-12

arxiv.org/abs/0706.1674v1

Physics

Quantum Physics

6 pages

Scientific paper

10.1103/PhysRevA.76.032107

We consider the quantum fluctuations of the Casimir-Polder force between a neutral atom and a perfectly conducting wall in the ground state of the system. In order to obtain the atom-wall force fluctuation we first define an operator directly associated to the force experienced by the atom considered as a polarizable body in an electromagnetic field, and we use a time-averaged force operator in order to avoid ultraviolet divergences appearing in the fluctuation of the force. This time-averaged force operator takes into account that any measurement involves a finite time. We also calculate the Casimir-Polder force fluctuation for an atom between two conducting walls. Experimental observability of these Casimir-Polder force fluctuations is also discussed, as well as the dependence of the relative force fluctuation on the duration of the measurement.

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