Schedule Feb 28, 2001
Physical Realizations of Quantum Bits: Trapped Ions and Cooper Pair Boxes
Dr. Steven Girvin, ITP & Indiana University
The problem of engineering a quantum computer is extremely daunting. However, the physics of why this will be difficult is interesting in its own right. As just one example, quantum phase coherence can decay even in the absence of energy relaxation. This talk will be a simple introduction to two physical realizations of quantum bits which have already been successfully demonstrated. The first involves spins of ions held in a trap and the second involves fabrication of mesoscopic superconductors so small that addition of a single electron costs a significant amount of energy.

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