Nist optical lattice clock
Webb11 dec. 2024 · The optical tweezer clock offers an intriguing compromise between the single-ion and lattice approaches. An optical tweezer is a tightly focused laser beam that can pull atoms (or other small objects) to its narrowest point. Webb24 mars 2024 · Clocks based on different atoms run at different rates, and the term ‘optical clock’ refers to one that runs at an optical frequency. Three of the world’s best optical clocks are the...
Nist optical lattice clock
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Webb28 mars 2008 · The transferred Nd:YAG laser light is then frequency-counted against another octave-spanning optical frequency comb at NIST , which is phase-stabilized to the Ca optical clock operating at 657 nm . Both comb systems have demonstrated the capability of supporting optical clocks at below the 10 –18 level . Webb19 juli 2024 · Researchers at the National Institute of Standards and Technology (NIST), USA, have unveiled a new instance of the group’s single-ion “quantum logic clock” that has demonstrated the lowest systematic frequency uncertainty, and thus the highest precision, of any clock yet shown—a stunning 9.4×10 –19 (Phys. Rev. Lett., doi: …
WebbThe Sr-lattice clock is also the most stable optical atomic clock in the world. Its precision timekeeping mechanism is based on a narrow electronic transition in Sr atoms trapped inside an optical lattice, which … Webb31 jan. 2024 · Developed and demonstrated the first lattice clock based on Yb. Achieved 3 x 10 -16 absolute uncertainty with a spin-1/2 lattice …
Webb6 okt. 2024 · Strontium optical lattice clocks have the potential to simultaneously interrogate millions of atoms with a high spectroscopic quality factor of 4 × 10 17.Previously, atomic interactions have forced a compromise between clock stability, which benefits from a large number of atoms, and accuracy, which suffers from density … WebbIn 2015 JILA evaluated the absolute frequency uncertainty of a strontium-87 optical lattice clock at 2.1 × 10 −18, which corresponds to a measurable gravitational time dilation for an elevation change of 2 cm (0.79 in) on planet Earth that according to JILA/NIST Fellow Jun Ye is "getting really close to being useful for relativistic geodesy".
WebbLattice-based optical clock using an even isotope of Yb Zeb W. Barber a,b,ChadW.Hoytc, Jason E. Stalnaker a,NathanLemkea,b,ChrisW.Oatesa, Tara M. Fortier a, Scott …
WebbPresently, we have two neutral clock systems in our laboratory, one based on freely expanding Ca atoms, the other based on Yb atoms confined to an optical lattice . The Ca standard at 657 nm has demonstrated a fractional frequency instability of < 4 x 10 -15 for 1 s averaging time and an absolute fractional uncertainty of 7.5 x 10 -15 . cotf00201xWebb24 mars 2024 · March 24, 2024. NIST researchers precisely compared the signals from three optical atomic clocks over air and optical fiber, with two of the clocks (indicated … coteyaWebb4 maj 2005 · An optical lattice is a region of space where standing light waves overlap to create a 3D potential that rises and falls periodically with position. The lattice has regular sites that are less than a wavelength … breath between each rep