Optomechanical systems, in which mechanical displacement of a macroscopic object is ponderomotively coupled to one or few modes of radiation, demonstrated extremely rapid development in past decades. Such systems provide unique benefits for metrology or displacement, mass, and force sensing. They open routes to the investigation of fundamental physical problems of quantum mechanics of macroscopic objects.

The radiation-pressure induced interaction in optomechanical systems allows to couple the mechanical mode to multiple modes of radiation, possibly, of different physical nature, e.g., an optical mode and a microwave one. The state of the art systems are capable of achieving such coupling at the level of single quanta, allowing the quantum information transfer between these modes. At the same time, the mechanical potential in the optomechanical systems can be engineered artificially, providing the nonlinearity, desired for quantum computation. This suggests the optomechanical systems as prospective candidates for quantum information processing.

This talk will present our recent proposals regarding quantum information transfer employing the tools of pulsed quantum cavity optomechanics. Particularly we will discuss entanglement of radiation modes generated via interaction with a mechanical mediator and storage, and preservation of non-classicality and quantum non-Gaussianity of Wigner function of a quantum state after the passage through an optomechanical channel.