Systematic evaluation of an atomic clock at 2 × 10 −18 total uncertainty
Travis Nicholson,Travis Nicholson,Sara Campbell,Sara Campbell,Ross B. Hutson,Ross B. Hutson,G. E. Marti,G. E. Marti,Benjamin Bloom,Benjamin Bloom,Benjamin Bloom,Rees McNally,Rees McNally,Wei Zhang,Wei Zhang,Murray D. Barrett,Murray D. Barrett,Marianna Safronova,Marianna Safronova,Gregory F. Strouse,Weston L. Tew,Jun Ye,Jun Ye +22 more
TLDR
This work performs a new accuracy evaluation of the JILA Sr clock, reducing many systematic uncertainties that limited previous measurements, such as those in the lattice ac Stark shift, the atoms' thermal environment and the atomic response to room-temperature blackbody radiation.Abstract:
Atomic clocks are increasingly important for many applications in scientific research and technology. Here, Nicholson et al. present a series of developments allowing them to achieve a new record in atomic clock performance, with a systematic uncertainty of just 2.1 × 10−18 for their 87Sr atomic clock.read more
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Quantum sensing
Abstract: "Quantum sensing" describes the use of a quantum system, quantum properties or quantum phenomena to perform a measurement of a physical quantity Historical examples of quantum sensors include magnetometers based on superconducting quantum interference devices and atomic vapors, or atomic clocks More recently, quantum sensing has become a distinct and rapidly growing branch of research within the area of quantum science and technology, with the most common platforms being spin qubits, trapped ions and flux qubits The field is expected to provide new opportunities - especially with regard to high sensitivity and precision - in applied physics and other areas of science In this review, we provide an introduction to the basic principles, methods and concepts of quantum sensing from the viewpoint of the interested experimentalist
Journal ArticleDOI
Search for New Physics with Atoms and Molecules
Marianna Safronova,Dmitry Budker,David DeMille,Derek F. Jackson Kimball,Andrei Derevianko,Charles W. Clark +5 more
TL;DR: In this article, the authors present a review of the application of atomic physics to address important challenges in physics and to look for variations in the fundamental constants, search for interactions beyond the standard model of particle physics and test the principles of general relativity.
Journal ArticleDOI
Quantum metrology with nonclassical states of atomic ensembles
TL;DR: In this article, the authors review and illustrate the theory and experiments with atomic ensembles that have demonstrated many-particle entanglement and quantum-enhanced metrology.
Journal ArticleDOI
Atomic clock performance enabling geodesy below the centimetre level
W. F. McGrew,W. F. McGrew,Xiaogang Zhang,Xiaogang Zhang,R. J. Fasano,R. J. Fasano,Stefan A. Schäffer,Stefan A. Schäffer,K. Beloy,Daniele Nicolodi,Daniele Nicolodi,Roger C. Brown,Roger C. Brown,N. Hinkley,N. Hinkley,Gianmaria Milani,Gianmaria Milani,Marco Schioppo,Marco Schioppo,Tai Hyun Yoon,Tai Hyun Yoon,Andrew D. Ludlow,Andrew D. Ludlow +22 more
TL;DR: Local optical clock measurements that surpass the current ability to account for the gravitational distortion of space-time across the surface of Earth are demonstrated and improved techniques allow the measurement of a frequency difference with an uncertainty of the order of 10–19 between two independent optical lattice clocks, suggesting that they may be able to improve state-of-the-art geodetic techniques.
References
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Journal ArticleDOI
An optical lattice clock with accuracy and stability at the 10 −18 level
Benjamin Bloom,Benjamin Bloom,Travis Nicholson,Travis Nicholson,Jason Williams,Jason Williams,Jason Williams,Sara Campbell,Sara Campbell,Michael Bishof,Michael Bishof,Xin Zhang,Xin Zhang,Wei Zhang,Wei Zhang,Sarah L. Bromley,Sarah L. Bromley,Jun Ye,Jun Ye +18 more
TL;DR: This work demonstrates a many-atom system that achieves an accuracy of 6.4 × 10−18, which is not only better than a single-ion-based clock, but also reduces the required measurement time by two orders of magnitude.
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Frequency Comparison of Two High-Accuracy Al+ Optical Clocks
TL;DR: An optical clock with a fractional frequency inaccuracy of 8.6x10{-18}, based on quantum logic spectroscopy of an Al+ ion, is constructed, consistent with the accuracy limit of the older clock.
Journal ArticleDOI
An atomic clock with $10^{-18}$ instability
N. Hinkley,N. Hinkley,Jeff Sherman,N. B. Phillips,Marco Schioppo,Nathan D. Lemke,K. Beloy,Marco Pizzocaro,Marco Pizzocaro,Christopher W. Oates,Andrew D. Ludlow +10 more
TL;DR: The development and operation of two optical lattice clocks are described, both using spin-polarized, ultracold atomic ytterbium, and an unprecedented atomic clock instability of 1.6 × 10–18 after only 7 hours of averaging is demonstrated.
Journal ArticleDOI
A sub-40-mHz-linewidth laser based on a silicon single-crystal optical cavity
Thomas Kessler,Christian Hagemann,Christian Grebing,Thomas Legero,Uwe Sterr,Fritz Riehle,Michael J. Martin,Lei Chen,Lei Chen,Jun Ye +9 more
TL;DR: In this article, a single-crystal silicon system that offers a fractional frequency instability of 1 × 10−16 at short timescales and supports a laser linewidth of less than 40 mHz at 1.5 µm is presented.