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Home NEWS Science News Chemistry

Canadian-built laser chills antimatter to near absolute zero for first time

Bioengineer by Bioengineer
March 31, 2021
in Chemistry
Reading Time: 3 mins read
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Researchers achieve world’s first manipulation of antimatter by laser

IMAGE

Credit: Chukman So/TRIUMF

Vancouver, BC – Researchers with the CERN-based ALPHA collaboration have announced the world’s first laser-based manipulation of antimatter, leveraging a made-in-Canada laser system to cool a sample of antimatter down to near absolute zero. The achievement, detailed in an article published today and featured on the cover of the journal
Nature, will significantly alter the landscape of antimatter research and advance the next generation of experiments.

Antimatter is the otherworldly counterpart to matter; it exhibits near-identical characteristics and behaviours but has opposite charge. Because they annihilate upon contact with matter, antimatter atoms are exceptionally difficult to create and control in our world and had never before been manipulated with a laser.

“Today’s results are the culmination of a years-long program of research and engineering, conducted at UBC but supported by partners from across the country,” said Takamasa Momose, the University of British Columbia (UBC) researcher with ALPHA’s Canadian team (ALPHA-Canada) who led the development of the laser. “With this technique, we can address long-standing mysteries like: ‘How does antimatter respond to gravity? Can antimatter help us understand symmetries in physics?’. These answers may fundamentally alter our understanding of our Universe.”

Since its introduction 40 years ago, laser manipulation and cooling of ordinary atoms have revolutionized modern atomic physics and enabled several Nobel-winning experiments. The results in Nature mark the first instance of scientists applying these techniques to antimatter.

By cooling antimatter, researchers will be able to perform a variety of precision tests to further investigate the characteristics of antimatter, including experiments that may shine a light on the fundamental symmetries of our Universe. These tests could offer clues as to why the Universe is made primarily of matter and not equal parts matter/antimatter as predicted by Big Bang models.

“It was a bit of crazy dream to manipulate antimatter with laser,” said Makoto Fujiwara, ALPHA-Canada spokesperson, TRIUMF scientist, and the original proponent of the laser cooling idea. “I am thrilled that our dream has finally come true as a result of tremendous teamwork of both Canadian and international scientists.”

The laser manipulation of antimatter also opens the door to a variety of leading-edge physics innovations. Momose and Fujiwara are now leading a new Canadian project, dubbed HAICU, to develop new quantum techniques for antimatter studies. “My next dream is to make a “fountain” of anti-atoms by tossing the laser-cooled antimatter into free space. If realized, it would enable an entirely new class of quantum measurements that were previously unthinkable,” said Fujiwara. “Furthermore, we are one step closer to being able to manufacture the world’s first antimatter molecules by joining anti-atoms together using our laser manipulation technology,” said Momose.

The results mark a watershed moment for ALPHA’s decades-long program of antimatter research, which began with the creation and trapping of antihydrogen for a world-record one thousand seconds in 2011. The collaboration also provided a first glimpse of the antihydrogen spectrum in 2012, set guardrails confining the effect of gravity on antimatter in 2013, and showcased an antimatter counterpart to a key spectroscopic phenomenon in 2020.

###

The Canadian effort was led by researchers and students from ALPHA-Canada (TRIUMF, UBC, Simon Fraser University, the University of Calgary, and York University) and contributors the University of Victoria and BCIT.

Media Contact
Stuart Shepherd
[email protected]

Original Source

https://www.triumf.ca/sites/default/files/TRIUMF_UBC_LaserCoolingPR_final.pdf

Related Journal Article

http://dx.doi.org/10.1038/s41586-021-03289-6

Tags: Atomic PhysicsAtomic/Molecular/Particle PhysicsChemistry/Physics/Materials SciencesParticle Physics
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