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Quarks Influenced by Their Neighborhood
November 20, 2009
The quark structure inside protons and neutrons changes based on the local nuclear environment, according to electron accelerator experiments.
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Jonathan Sun
Jonathan Sun received a B.S. degree in physics from Fudan University, Shanghai, China, in 1984, and M.S. and Ph.D. degrees in applied physics from Stanford University in 1986 and 1989, respectively. For the following two years, he worked at Superconductor Technologies Inc. in Santa Barbara, California, as a member of the technical staff. He subsequently joined IBM at the Thomas J. Watson Research Center as a Research Staff Member in the Physical Sciences Department where he has worked on advanced superconducting and magnetic devices. Dr. Sun is a fellow of the American Physical Society.
Switching a nanomagnet is all in the timing
If a magnet is small enough, an electric current carrying polarized spins can flip it around. Scientists are finding clever ways to control this spin-torque effect precisely, both for when it is wanted and when it is not. Read More »