Nondeterminstic ultrafast ground state cooling of a mechanical resonator

TL;DR

This paper proposes a rapid and robust method for cooling a mechanical resonator to its ground state using repeated random measurements on an auxiliary qubit, effective even in noisy environments.

Contribution

It introduces a novel ultrafast ground state cooling scheme that requires only several measurements and is insensitive to measurement timing and environmental noise.

Findings

Ground state cooling achieved with few measurements

Cooling efficiency independent of measurement intervals

Robust against environmental noise

Abstract

We present an ultrafast feasible scheme for ground state cooling of a mechanical resonator via repeated random time-interval measurements on an auxiliary flux qubit. We find that the ground state cooling can be achieved with \emph{several} such measurements. The cooling efficiency hardly depends on the time-intervals between any two consecutive measurements. The scheme is also robust against environmental noises.