Zeptonewton force sensing with nanospheres in an optical lattice

  title={Zeptonewton force sensing with nanospheres in an optical lattice},
  author={Gambhir Ranjit and Mark Cunningham and Kirsten Casey and Andrew A Geraci},
  journal={Physical Review A},
Optically trapped nanospheres in high vacuum experience little friction and hence are promising for ultrasensitive force detection. Here we demonstrate measurement times exceeding ${10}^{5}$ s and zeptonewton force sensitivity with laser-cooled silica nanospheres trapped in an optical lattice. The sensitivity achieved exceeds that of conventional room-temperature solid-state force sensors by over an order of magnitude, and enables a variety of applications including electric-field sensing… 

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