These additional kicks used the random thermal motion of the water to do the work of moving the bead, in effect yielding something for nothing. (scientificamerican.com)
Sensing of single nuclear spins in random thermal motion with proximate nitrogen - vacancy centers M. Bruderer, P. Fernández - Acebal, R. Aurich and M. B. Plenio Phys. (qubit-ulm.com)
«These results improve our understanding of friction and thermal motion at the nanoscale and will be helpful in the design and construction of future nanodevices,» says Christoph Dellago, one of the authors of the study. (sciencedaily.com)