Khosla, Kiran and Vanner, Michael and Ares, N and Laird, Edward Alexander (2018) Displacemon Electromechanics : How to Detect Quantum Interference in a Nanomechanical Resonator. Physical Review X, 8: 021052. ISSN 2160-3308
Full text not available from this repository.Abstract
We introduce the “displacemon” electromechanical architecture that comprises a vibrating nanobeam, e.g., a carbon nanotube, flux coupled to a superconducting qubit. This platform can achieve strong and even ultrastrong coupling, enabling a variety of quantum protocols. We use this system to describe a protocol for generating and measuring quantum interference between trajectories of a nanomechanical resonator. The scheme uses a sequence of qubit manipulations and measurements to cool the resonator, to apply two effective diffraction gratings, and then to measure the resulting interference pattern. We demonstrate the feasibility of generating a spatially distinct quantum superposition state of motion containing more than 10^6 nucleons using a vibrating nanotube acting as a junction in this new superconducting qubit configuration.