Magic wavelength at 477 nm for the strontium clock transition

We report the experimental measurement of a magic wavelength at 476.82362(8) nm for the 88Sr clock transition. The magic wavelength is determined through AC-Stark shift spectroscopy of atoms in an optical dipole trap. The value slightly deviates from the theoretical prediction by 0.061(54) nm. This magic wavelength, being shorter than the common one at 813 nm, will be important for applications such as Bragg pulses for matter-wave interferometry involving both clock states. This work also paves the way for quantum simulation with a shorter lattice.

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