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Nature Physics Profile picture
@NaturePhysics
May 20, 2019 • 11 tweets • 4 min read • Read on X
Happy World Metrology Day! Today, 7 fundamental constants of nature are redefined as exact numerical values, in turn redefining base units such as the metre and the kilogram. Find out more about this reformation in Bill Philips' #MeasureForMeasure column | go.nature.com/endofartefacts Image
Metrology is a fascinating, and hugely important, discipline - one that underpins our fundamental understanding of science as much as the practical foundations of all international commerce throughout human history. It is worth celebrating in full: go.nature.com/2HqOs5P
You can read more about the re-defined base units in our metrology column, Measure for Measure - it is free to read and includes pieces on all the redefined base units. (1) Helen Margolis on the second go.nature.com/2BJiQ5E
(2) Richard Davis on the metre go.nature.com/2MacrGp
(3) Stephan Schlamminger on the kilogram go.nature.com/2WV5Q87
(4) @TaroniAndrea on the mole go.nature.com/2DRRpgc
(5) François Piquemal on the Ampere go.nature.com/2Q9okiL
(6) Michael de Podesta on the Kelvin go.nature.com/2WSzyKT
(7) Yuqin Zong on the Candela go.nature.com/2WTKMip
Want to read more the new system of units? Joachim Fischer & Joachim Ullrich have written just the piece for you go.nature.com/2VABg29
Finally, if (a) you really can't contain your excitement and (b) happen to be in Berlin, you can join us in our #WorldMetrologyDay celebration. Registration is FREE: go.nature.com/worldmetrology… Image

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More from @NaturePhysics

Nature Physics Profile picture
Dec 8, 2021
This month we also have an Insight on Ultracold atom technologies go.nature.com/31LXKpP
The Insight is briefly introduced in this editorial by our editors Richard Brierley and Yun Li go.nature.com/3GswKdO
Comment by Jook Walraven | Cold atoms stay cool go.nature.com/3pX9TRh
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Nature Physics Profile picture
Oct 1, 2020
Sweet fifteen | Nature Physics turns 15 this month, so we thought we'd celebrate 🎉

go.nature.com/34k8IjI Image
Feature | Over the last 15 years, the content of Nature Physics has covered an enormous breadth of subjects at the forefront of physics. The journal’s past and present editors recount their favourite papers go.nature.com/2GsD77a Image
Thanks to Hugo Defienne and Daniele Faccio, University of Glasgow (top left); Serim Ilday, Bilkent University – UNAM (top right and bottom left); Immanuel Bloch, Max Planck Institute of Quantum Optics (bottom right) for providing us with the images for the cover! Image
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Nature Physics Profile picture
Sep 1, 2020
Our September editorial is our a little early (rest of the issue isn't due until Thursday!) This month, we take time to check in on the progress at ITER and nuclear fusion research more broadly | The way ahead for fusion go.nature.com/2ESdQCQ
Inside ITER | Q&A with @iterorg’s Director-General, Bernard Bigot, and Tim Luce, head of its Science & Operations Department go.nature.com/3lFoAoP
A brief history of nuclear fusion | Matteo Barbarino discusses the role played by the International Atomic Energy Agency in shaping the field of nuclear fusion over the decades go.nature.com/2ENgBFn Image
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Nature Physics Profile picture
Jul 7, 2020
This month, a Focus issue highlights recent developments in fundamental research on superconductivity

Editorial | go.nature.com/2DcQfM8 Image
Review by Benjamin Sacépé, Mikhail Feigel’man & Teunis M. Klapwijk | Quantum breakdown of superconductivity in low-dimensional materials go.nature.com/3gzElu9
Perspective | Pre-formed Cooper pairs in copper oxides and LaAlO3—SrTiO3 heterostructures go.nature.com/31QU1VS
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Nature Physics Profile picture
Apr 6, 2020
This month, we Focus on the European Strategy for Particle Physics go.nature.com/39KAery Image
This is the decision-making process underpinning the long-term future of particle physics in Europe, and it is due to be updated in 2020 | Read more in our editorial: Strategy for the future go.nature.com/2whwbFi
Future Circular Colliders succeeding the LHC | Michael Benedikt et al consider the merits of the Future Circular Collider go.nature.com/2JMHJ6s
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Nature Physics Profile picture
Mar 2, 2020
Check out our Focus issue on cavity quantum electrodynamics (cQED) go.nature.com/cQED Image
What is cQED? Roughly, a platform to study and manipulate light-matter interactions at the quantum level | Read more in our Editorial: The ABC of cQED go.nature.com/ABCcQED
Quantum Josephson junction circuits and the dawn of artificial atoms | John M. Martinis, Michel H. Devoret & John Clarke recount the history of this milestone for the development of superconducting quantum circuits. go.nature.com/2TuziBw
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