Author(s): R. W. Peterson, T. P. Purdy, N. S. Kampel, R. W. Andrews, P.-L. Yu, K. W. Lehnert, and C. A. Regal
A 40-nanometer-thick membrane has been cooled to a low enough temperature that is has the minimum phonon occupation allowed by quantum backaction.
[Phys. Rev. Lett. 116, 063601] Published Mon Feb 08, 2016