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Measurement of Fundamental Parameters

Content About: Measurement of Fundamental Parameters

Published: 10/09/2017 - 11:13am Type of Content: Article-Research Highlight

Why are we here? This is an age-old philosophical question. However, physicists like Will Cairncross, Dan Gresh and their advisors Eric Cornell and Jun Ye actually want to figure out out why people like us exist at all. If there had been the same amount of matter and antimatter created in the Big Bang, the future of stars, galaxies, our Solar System, and life would have disappeared in a flash...

Published: 10/05/2017 - 12:38pm Type of Content: Article-Research Highlight

Imagine A Future . . . The International Moon Station team is busy on the Moon’s surface using sensitive detectors of gravity and magnetic and electric fields looking for underground water-rich materials, iron-containing ores, and other raw materials required for building a year-round Moon station. The station’s mission: launching colonists and supplies to Mars for colonization. Meanwhile,...

Published: 04/21/2015 - 9:16am Type of Content: Article-Research Highlight

The Ye group has just improved the accuracy of the world’s best optical atomic clock by another factor of three and set a new record for clock stability. The accuracy and stability of the improved strontium lattice optical clocks is now about 2 x 10-18, or the equivalent of not varying from perfect time by more than one second in 15 billion years—more than the age of the Universe. Clocks like...

Published: 12/06/2013 - 7:43am Type of Content: Article-Research Highlight

Physicists wonder about some pretty strange things. For instance, one burning question is: How round is the electron? While the simplest picture of the electron is a perfect sphere, it is possible that it is instead shaped like an egg. The egg shape would look a bit like a tiny separation of positive and negative charges. Physicists call this kind of charge separation an electric dipole moment...

Published: 08/24/2011 - 6:00pm Type of Content: Article-Research Highlight

JILA’s quest to determine whether the electron has an electric dipole moment (eEDM) began in 2006 with a suggestion by Fellow Eric Cornell that the molecular ion hafnium fluoride (HfF+) might be well suited for an eEDM experiment. An electric dipole moment is a measure of the separation of positive and negative charges in a system. If an electron does have an electric dipole moment, it’s...

Published: 02/09/2010 - 5:00pm Type of Content: Article-Research Highlight

The race to measure the electron’s electric dipole moment (eEDM) is picking up speed across the world, thanks to graduate student Ed Meyer of JILA’s Lazy Bohn’s Ranch (i.e., John Bohn’s theory group). Meyer has identified more than a dozen horses, a.k.a. molecules and molecular ions, with strong enough internal electric fields to compete in the eEDM derby. Imperial...

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Published: 06/24/2013 - 11:14am Type of Content: Research Areas
Electron Electric Dipole Moment

The Eric Cornell and Jun Ye groups are investigating whether the electron has an electric dipole moment (eEDM). An electric dipole moment is a measure of a tiny separation of positive and negative charges in a system. If the electron does have an electric dipole moment, it's a pretty darn small one.

But even a very small eEDM would...

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