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Chapman University affiliated physicist publishes on the Aharonov-Bohm effect in Nature
Date:5/14/2014

ORANGE, Calif. Chapman University affiliated quantum physicist Yutaka Shikano, Ph.D., has published a milestone paper in the prestigious journal Nature Communications. The title of the article is "Aharonov-Bohm effect with quantum tunneling in linear Paul trap." The Aharonov-Bohm (AB) effect was proposed by Yakir Aharonov, who is the co-director of the Institute for Quantum Studies at Chapman University, and David J. Bohm in 1959.

The AB effect showed for the first time that a magnetic field inside a confined region can have a measureable impact on a charged particle which never traveled inside the region. This purely quantum effect, verified in a multitude of experimental set-ups, is at the heart of much of modern physics. In 1986, Akira Tonomura and his coworkers used electron holography (which is a key technology behind the electron microscope) to empirically prove the existence of the Aharonov-Bohm effect.

Another aspect of quantum theory is "tunneling," a phenomenon in which a particle can go places where it is not allowed to go classically, and a fundamental component of the Nature paper. Applications of tunneling include nuclear fusion, the diode used throughout electronics, and different types of microscopes. Although it has been observed on large scales, no one has yet actually measured the tunneling of a single particle until now. Yutaka Shikano, who is an affiliated member of the Institute for Quantum Studies at Chapman and a research associate professor at the Research Center of Integrative Molecular Systems (CIMoS), Institute for Molecular Science and the Urabe group of Osaka University observed this effect for the first time.

The experiment was performed at Osaka University using an ion trap system. Due to recent developments of quantum technology, the team was able to manipulate the ground state of an ion using laser cooling. They used three calcium ions arranged in a triangular structure. The observed tunneling was b
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Contact: Sheri Ledbetter
sledbett@chapman.edu
714-289-3143
Chapman University
Source:Eurekalert  

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Chapman University affiliated physicist publishes on the Aharonov-Bohm effect in Nature
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