Superfluid $^4$He is a promising material for optomechanical and electromechanical applications due to its low acoustic loss. Some of the more intriguing aspects superfluidity -- macroscopic coherence, topological nature vorticity, capability supporting non-classical flows remain, however, poorly explored resources in opto- electro-mechanical systems. Here, we present an coupling pure superflow...

A model of charge separation in quantum photosynthesis as a feedback control system interacting excitons and vibrons is introduced. Quantum this approach describes the Landau--Zener transition with decoherence. The explains irreversibility process for -- direct transitions will have probabilities close to one reverse zero. This can be considered ratchet. Also coincidence energy vibron paired Bo...