Generation of mechanical cat-like states via optomagnomechanics

Abstract

We propose an optomagnomechanical approach for preparing a cat-like superposition state of mechanical motion. Our protocol consists of two steps and is based on the magnomechanical system where the magnetostrictively induced displacement further couples to an optical cavity mode via radiation pressure. We first prepare a squeezed mechanical state by driving the magnomechanical system with two microwave pulses. We then switch off the microwave drives and send a weak red-detuned optical pulse to the optical cavity to weakly activate the optomechanical anti-Stokes scattering. We show that $k$ phonons can be subtracted from the prepared squeezed thermal state, conditioned on the detection of $k$ anti-Stokes photons from the cavity output field, which prepares the mechanical motion in a cat-like state. The work provides a new avenue for preparing mechanical superposition states by combining opto- and magnomechanics and may find applications in the study of macroscopic quantum states and the test of collapse theories.

References in corpus (6)

• Observation of strong coupling between a micromechanical resonator and an optical cavity field
• Generation of a superposition of odd photon number states for quantum information networks
• Schrödinger cat states of a 16-microgram mechanical oscillator
• Cavity magnomechanics: from classical to quantum
• Stationary optomagnonic entanglement and magnon-to-optics quantum state transfer via opto-magnomechanics
• Generation of optomicrowave and optomagnonic entanglements in cascaded optomagnomechanical systems