Talk detail

Participant	Robinson, John
Institution	JILA, University of Colorado at Boulder - 440 UCB - Boulder - Colorado - USA

Session	PT4	Accepted		Order	Time
Talk	Oral abstract	Title	Search for Dark Matter with an Optical Lattice Clock
Coauthors
Abstract	We report on an experimental search for ultralight, scalar dark matter by frequency comparisons of a cryogenic silicon optical cavity and a 1D optical lattice clock. If a scalar dark matter particle couples to the Standard Model, it will give rise to an oscillating fine-structure constant, α. Sensitivity to dark matter is provided by the different coupling to α for the silicon crystal bond length and the strontium atomic transition frequency. Due to the extraordinary coherence time of our ultrastable laser, we achieve competitive bounds of α-variation for Fourier frequencies from 0.1 mHz to 0.1 Hz. We will also discuss the strategy of using dynamical-decoupling to extend sensitivity to higher Fourier frequencies.
Pdf file