Engineering entangled coherent states of magnons and phonons via a transmon qubit

Abstract

Entangled coherent states exhibit a special form of entanglement between two or more bosonic modes, which is useful for several tasks in quantum information and fundamental studies of quantum mechanics. Here, the authors propose a scheme for generating and controlling such states between distant magnets or mechanical resonators, using a superconducting qubit that couples via its inductance to the quanta of the collective magnetic excitations (magnons) or the vibrational excitations in mechanical beams (phonons). The results establish a promising platform for quantum information using magnonic and mechanical hybrid quantum devices.

Topics & Concepts