Nonlinear Sideband Cooling to a Cat State of Motion

Published

May 25, 2023

Author(s)

Bradley Hauer, Joshua Combes, John Teufel

Abstract

The ability to prepare a macroscopic mechanical resonator into a quantum superposition state is an outstanding goal of cavity optomechanics. Here, we propose a technique to generate cat states of motion using the intrinsic nonlinearity of a dispersive optomechanical interaction. By applying a bichromatic drive to an optomechanical cavity, our protocol enhances the inherent second-order processes of the system, inducing the requisite two-phonon dissipation. We show that this nonlinear sideband cooling technique can dissipatively engineer a mechanical resonator into a cat state, which we verify using the full Hamiltonian and an adiabatically reduced model. While the fidelity of the cat state is maximized in the single-photon, strong-coupling regime, we demonstrate that Wigner negativity persists even for weak coupling. Finally, we show that our cat state generation protocol is robust to significant thermal decoherence of the mechanical mode, indicating that such a procedure may be feasible for near-term experimental systems.

Citation

Physical Review Letters

Volume

130

Pub Type

Journals

Download Paper

https://doi.org/10.1103/PhysRevLett.130.213604

Local Download

Keywords

Optomechanics, nanomechanics, quantum optics, quantum sensing, quantum computing

Citation

Hauer, B. , Combes, J. and Teufel, J. (2023), Nonlinear Sideband Cooling to a Cat State of Motion, Physical Review Letters, [online], https://doi.org/10.1103/PhysRevLett.130.213604, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=935131 (Accessed October 13, 2025)