Generation of quantum multi-phonon states in a mechanical oscillator
The main objective of the QuPhon research action is to develop a novel hybrid quantum system between a mechanical oscillator and a superconducting qubit, especially focusing on the generation of nonclassical multi-phonon states in an ultra high-Q mechanical oscillator. The challenging task will be realized by utilizing itinerant microwave photons transferring nonclassical states in a microwave memory cavity to a mechanical oscillator. The architecture of connecting spatially separated quantum modules that function differently enables one to exploit their complementary advantages simultaneously. The achievements will bridge independently-developed quantum technologies between electromechanics and circuit quantum electrodynamics, which will lead to further quantum applications, such as quantum memory and quantum transducer with hardware-efficient quantum error corrections, as well as studies on quantum coherence between two macroscopically distinct states in a massive object.