J. B. Pendry

Oct 28, 2024 | link.aps.org | Daigo Oue |Instituto de Telecomunicações |Instituto Técnico |J. B. Pendry

We investigate the frictional force arising from quantum fluctuations when two dissipative metallic plates are set in a shear motion. While early studies showed that the electromagnetic fields in the quantum friction setup reach nonequilibrium steady states, yielding a time-independent force, other works have demonstrated the failure to attain steady states, leading to instability and time-varying friction under sufficiently low-loss conditions.

Jun 1, 2023 | link.aps.org | Daigo Oue |Instituto Técnico |Kun Ding |J. B. Pendry

Abstract In this study, we reveal noncontact frictional forces between surfaces in the presence of peristaltic permittivity modulation. Our setup comprises a conducting medium, an air gap, and a dielectric substrate on which we have a space-time-modulated grating that emits electromagnetic radiation.