David P. Pappas
Quantum Computing and Information Storage in the Solid State
Wednesday, February 7, 2007
Building 3 Auditorium - 3:30 PM

David P. Pappas , will talk about Quantum Computing and Information Storage in the Solid State. Storage of coherent quantum states is critical to the new field of quantum computing. In order to enable this technology, it is critical to store quantum information long enough to conduct a meaningful calculation.  The lifetimes of quantum information in a solid state system can be relatively short because the interaction times are on the order of nano-seconds.  Therefore, we have established the goal of preserving quantum information for times ranging from 1 microsecond to 1 millisecond.  Significant progress toward this end has been made at NIST.  In this talk, a brief outline of the advantages of quantum computation is given and progress toward developing a practical solid state implementation discussed.  In particular, the problem of decoherence of the quantum states and stability of quantum data in the devices will be demonstrated.  Using single crystal substrates and epitaxial growth of the electrodes, we have found a significant improvement in the coherence and lifetimes of the information.  This demonstrates the potential for improvements in the field of solid state quantum computing.

IS&T Colloquium Committee Host: Ben Kobler