Photoassociation measurements to evaluate collisional shifts in strontium and prospects for clock spectroscopy with ytterbium molecules

摘要

We report on a photoassociation approach to determine the scattering lengths for^{1So-3Po and3Po-3Po cold collisions. Positions of molecular states, connected with asymptotes of1So+3S1 and3Po+3S1 states could be determined using a tunable 679 nm laser and atoms trapped in an optical lattice. This approach allows an indirect calculation (without direct probing of1S0-3P0 molecular state) of the effect of cold collisions on an optical atomic clock operation. We also propose to realize a molecular clock with bosonic ytterbium molecules.}