Casimir-Lifshitz interaction between bodies integrated in a microelectromechanical/nanoelectromechanical quantum damped oscillator
Phys. Rev. B 113, 085406 – Published 4 February, 2026
DOI: https://doi.org/10.1103/b6kg-nykc
Abstract
A theory is proposed for the component of the Casimir-like force that arises between bodies embedded in a macroscopic quantum damped oscillator. When the oscillator's parameters depend on the distance between the bodies, the oscillator-induced Casimir-like force is generally determined by a broad spectral range extending to high frequencies, limited by the frequency dispersion of the damping function. Here, it is shown that there exists a large class of systems in which the low-frequency range dominates the forces. This allows one to use the Ohmic approximation, which is crucial for extending the theory to a lumped-element description of fluctuation-induced forces in electrical circuits. Estimates of the circuit-induced Casimir-Lifshitz force suggest that under certain conditions it can be identified experimentally due to its dependence on various circuit elements.
