Phys.org  November 14, 2024 Entanglement in hybrid quantum systems comprised of fundamentally different degrees of freedom, such as light and mechanics, is of interest for a wide range of applications in quantum technologies. Researchers in Germany proposed engineering bipartite entanglement between traveling acoustic phonons in a Brillouin active solid-state system and the accompanying light wave by applying optical pump pulses to state-of-the-art waveguides, exciting a Brillouin Stokes process. The pulsed approach, in a system operating in a regime orthogonal to standard optomechanical setups, allowed for the generation of entangled photon-phonon pairs, resilient to thermal fluctuations. They proposed an experimental platform […]