Kavli Affiliate: Giorgio Gratta
| First 5 Authors: Charles P. Blakemore, Alexander Fieguth, Akio Kawasaki, Nadav Priel, Denzal Martin
| Summary:
We report on a search for non-Newtonian forces that couple to mass, with a
characteristic scale of ${sim}10~mu$m, using an optically levitated
microsphere as a precision force sensor. A silica microsphere trapped in an
upward-propagating, single-beam, optical tweezer is utilized to probe for
interactions sourced from a nanofabricated attractor mass with a density
modulation brought into close proximity to the microsphere and driven along the
axis of periodic density in order to excite an oscillating response. We obtain
force sensitivity of ${lesssim}10^{-16}~rm{N}/sqrt{rm{Hz}}$. Separately
searching for attractive and repulsive forces results in the constraint on a
new Yukawa interaction of $|alpha| gtrsim 10^8$ for $lambda > 10~mu$m. This
is the first test of the inverse-square law using an optically levitated test
mass of dimensions comparable to $lambda$, a complementary method subject to a
different set of systematic effects compared to more established techniques.
| Search Query: ArXiv Query: search_query=au:”Giorgio Gratta”&id_list=&start=0&max_results=10