Quantum Fluctuations of Mass for a Mirror in Vacuum
  A mirror in vacuum is coupled to fluctuating quantum fields. As a result, its energy-momentum and mass fluctuate. We compute the correlation spectra of force and mass fluctuations for a mirror at rest in vacuum (of a scalar field in a two-dimensional space-time). The obtained expressions agree with a mass correction equal to a vacuum energy stored by the mirror. We introduce a Lagrangian model which consistently describes a scalar field coupled to a scatterer, with inertial mass being a quantum variable. 
Marc-Thierry Jaekel (Laboratoire de Physique The'orique de l'Ecole   Normale Supe'rieure) and Serge Reynaud (Laboratoire Kas...