TY - RPRT TI - Clock Precision beyond the Standard Quantum Limit at 10 −18 Level AU - Yang, Y. A. [National Inst. of Standards and Technology (NIST), Boulder, CO (United States); Univ. of Colorado, Boulder, CO (United States). JILA] (ORCID:0000000275706740) AU - Miklos, Maya [National Inst. of Standards and Technology (NIST), Boulder, CO (United States); Univ. of Colorado, Boulder, CO (United States). JILA] (ORCID:0009000304451378) AU - Tso, Yee Ming [National Inst. of Standards and Technology (NIST), Boulder, CO (United States); Univ. of Colorado, Boulder, CO (United States). JILA] (ORCID:0000000266904892) AU - Kraus, Stella [National Inst. of Standards and Technology (NIST), Boulder, CO (United States); Univ. of Colorado, Boulder, CO (United States). JILA] (ORCID:0009000083739799) AU - Hur, Joonseok [National Inst. of Standards and Technology (NIST), Boulder, CO (United States); Univ. of Colorado, Boulder, CO (United States). JILA] (ORCID:0000000326363865) AU - Ye, Jun [National Inst. of Standards and Technology (NIST), Boulder, CO (United States); Univ. of Colorado, Boulder, CO (United States). JILA] (ORCID:0000000300762112) PY - 2025 DO - 10.1103/6v93-whwq UR - https://www.osti.gov/biblio/3376328 ID - 3376328 ER -