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UCSB physicists make discovery in the quantum realm
Date:3/4/2013

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most important features of this research. "In optics, people imagine sending information from Earth to a satellite and then back really remote quantum communication," he said.

"The shutter controls the release of this photon," said Chen. "You need to perfectly transfer a bit of information, and this shutter helps you to do that."

Co-author Jim Wenner, a graduate student in the Martinis lab, explained another application. "Another one, again with communication, would be providing ways to transmit signals in a secure manner over long distances," said Wenner.

He said that, instead of another shutter, Yin used classical electronics to drive the photon. She then captured the signal in the superconducting cavity, in an area called the meander, or the resonator. Then the shutter controlled the release of the photon.

Wenner explained that the resonator, a superconducting cavity, is etched on the flat, superconducting chip which is about one quarter of an inch square. It is chilled to a temperature of about minus-273.12 degrees Celsius.

Yin completed her B.S. in physics at the University of Science and Technology in China, before going to Harvard University to earn a Ph.D. in physics. Of the time she spent at UCSB, Yin said: "The Martinis group is one of the best groups in the field of superconducting quantum devices in the world, which strongly attracted me to find the opportunity to work here.

"The whole group is a very young, energetic, and creative team, with the strong leadership and support of Professor John Martinis. I am very happy to have learned the advanced techniques and to have studied the exotic quantum devices of this group." She credits the support of the entire UCSB team, especially important technique support from co-authors Yu Chen, Daniel Sank, Peter O'Malley, Ted White, and Jim Wenner.


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Contact: Gail Gallessich
gail.g@ia.ucsb.edu
805-893-7220
University of California - Santa Barbara
Source:Eurekalert  

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