Abstract: Quantum mechanics is traditionally considered when measuring at the extreme microscopic scale, i.e. single photons, electrons or atoms. However, even the early pioneers of the quantum theory postulated gedanken experiments in which quantum effects would manifest on an everyday scale. I will present recent experiments in which we engineer and measure microelectromechanical (MEMs) circuits to observe and to exploit quantum behavior at an increasingly macroscopic scale. By embedding mechanical resonators in superconducting microwave circuits, we achieve strong radiation-pressure coupling between fields and motion that allows us to perform quantum experiments of massive objects. I will present our recent experimental demonstration of deterministic macroscopic entanglement, as well as ongoing efforts toward arbitrary quantum control of mechanical systems. The ability to prepare and to “listen” to quantum sound has implications for fundamental science as well as many powerful applications including the processing, storage and networking of quantum information.
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