Skip to main content

Reset your password

Please enter the e-mail address you used to register to reset your password

Note: The verification e-mail to change your password should arrive immediately. However, in some cases it takes longer. Don't forget to check your spam folder.

If you haven't received the e-mail in 24 hours, please contact customerservices@ioppublishing.org

Registration complete

Thank you for registering with Physics World
If you'd like to change your details at any time, please visit My account

Close
Metrology

Metrology

Three top atomic clocks are compared with record accuracy

26 Mar 2021 Hamish Johnston
Atomic clock connections
Time triangle: illustration of how the ytterbium (Yb), strontium (Sr) and aluminium-magnesium (Al+/Mg+) atomic clocks were connected. (Courtesy: N Hanacek/NIST)
The time kept by three of the world’s best atomic clocks has been compared by connecting them usin

You’ve reached the limit of what you can view on Physics World without registering

If you already have an account on Physics World, then please sign in to continue reading

If you do not yet have an account, please register so you can

  • Access more than 20 years of online content
  • Choose which e-mail newsletters you would like to receive
Hamish Johnston is an online editor of Physics World
Read previous

Ultrafast low-dose PET scans will benefit cancer patients
Read next

Nanoparticle sensors detect arsenic in drinking water

Discover more from Physics World

Related jobs

Related events

Copyright © 2024 by IOP Publishing Ltd and individual contributors