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The sound of an atom has been captured
09-14-2014, 11:46 PM #1
Octo Mother Superior
Posts:42,992 Threads:1,473 Joined:Feb 2011
Quote:Researchers at Chalmers are first to show the use of sound to communicate with an artificial atom. They can thereby demonstrate phenomena from quantum physics with sound taking on the role of light.

"According to the theory, the sound from the atom is divided into quantum particles", says Martin Gustafsson, the article's first author. "Such a particle is the weakest sound that can be detected."

Since sound moves much slower than light, the acoustic atom opens entire new possibilities for taking control over quantum phenomena.

"Due to the slow speed of sound, we will have time to control the quantum particles while they travel" says Martin Gustafsson. "This is difficult to achieve with light, which moves 100,000 times more quickly."

The low speed of sound also implies that it has a short wavelength compared to light. An atom that interacts with light waves is always much smaller than the wavelength. However, compared to the wavelength of sound, the atom can be much larger, which means that its properties can be better controlled. For example, one can design the atom to couple only to certain acoustic frequencies or make the interaction with the sound extremely strong.

The frequency used in the experiment is 4.8 gigahertz, close to the microwave frequencies common in modern wireless networks. In musical terms, this corresponds approximately to a D28, about 20 octaves above the highest note on a grand piano.

http://www.chalmers.se/en/news/Pages/The...tured.aspx

Interesting. I hope they find fascinating things.



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