303 citations · 1.1k across the 29 of their papers we have counts for
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Tracking a nonrelativistic charge with an array of Rydberg atoms
Akio Kawasaki
Charged particle tracking has played a key role in the development of particle physics, particularly for understanding phenomena involving short-lived particles precisely. As a pla…
Observation of the clock transition at 431 nm in Yb
Akio Kawasaki, Takumi Kobayashi, Akiko Nishiyama +2
We report on the observation of the transition at 431 nm in Yb by depleting atoms in a magneto-optical trap formed by the $6s^{2…
Search for ultralight dark matter from long-term frequency comparisons of optical and microwave atomic clocks
Takumi Kobayashi, Akifumi Takamizawa, Daisuke Akamatsu +8
We search for ultralight scalar dark matter candidates that induce oscillations of the fine structure constant, the electron and quark masses, and the quantum chromodynamics energy…
Evidence of Two-Source King Plot Nonlinearity in Spectroscopic Search for New Boson
Joonseok Hur, Diana P. L. Aude Craik, Ian Counts +12
Optical precision spectroscopy of isotope shifts can be used to test for new forces beyond the Standard Model, and to determine basic properties of atomic nuclei. We measure isotop…
Evidence for Nonlinear Isotope Shift in Yb Search for New Boson
Ian Counts, Joonseok Hur, Diana P. L. Aude Craik +7
We measure isotope shifts for five Yb isotopes with zero nuclear spin on two narrow optical quadrupole transitions , ${}^2S_{1/2} \rightarr…
Trapping Yb Atoms into a One-Dimensional Optical Lattice with a Small Waist
Akio Kawasaki, Boris Braverman, Edwin Pedrozo-Peñafiel +4
In most experiments with atoms trapped in optical lattices, the transverse size of the optical lattice beams is on the order of tens of micrometers, and loading many atoms into sma…
Near-Unitary Spin Squeezing in Yb
Boris Braverman, Akio Kawasaki, Edwin Pedrozo-Peñafiel +9
Spin squeezing can improve atomic precision measurements beyond the standard quantum limit (SQL), and unitary spin squeezing is essential for improving atomic clocks. We report sub…
Geometrically asymmetric optical cavity for strong atom-photon coupling
Akio Kawasaki, Boris Braverman, Edwin Pedrozo-Peñafiel +11
Optical cavities are widely used to enhance the interaction between atoms and light. Typical designs using a geometrically symmetric structure in the near-concentric regime face a…
Fast Compact Laser Shutter Using a Direct Current Motor and 3D Printing
Grace H. Zhang, Boris Braverman, Akio Kawasaki +1
We present a mechanical laser shutter design that utilizes a DC electric motor to rotate a blade which blocks and unblocks a light beam. The blade and the main body of the shutter…
Magic Wavelength for Hydrogen 1S-2S Transition
Akio Kawasaki
The magic wavelength for an optical lattice for hydrogen atoms that cancels the lowest order AC Stark shift of the 1S-2S transition is calculated to be 513 nm. The magnitude of AC…
Two-Color Magneto-Optical Trap with Small Magnetic Field for Ytterbium
Akio Kawasaki, Boris Braverman, QinQin Yu +1
We report a two-color magneto-optical trap (MOT) for ytterbium atoms operating at a low magnetic field gradient down to 2 G/cm where a conventional MOT using the singlet transition…