Kovacs Memory Effect with an Optically Levitated Nanoparticle

The understanding of the dynamics nonequilibrium cooling and heating processes at nanoscale is still an open problem. These can follow surprising relaxation paths due to, e.g., memory effects, which significantly alter expected equilibration routes. Kovacs effect take place when a thermalization process suddenly interrupted by change bath temperature, leading to non-monotonic dependence energy system. Here, we demonstrate that be observed in center mass motion levitated nanoparticle. temperature controlled during experiment through external source white gaussian noise. We describe our experiments terms Brownian particle harmonic trap without any fitting parameter, suggesting canappear large variety systems.