Negative Quantum Channels

James M. McCracken received his Physics M.S. studying decoherence in quantum dot qubit structures at the University of Central Florida, and he received two B.S. degrees, one in Physics and one in Astrophysics, from the Florida Institute of Technology. He was a member of both the theoretical quantum computing team at Science Applications International Corporation (SAIC) and the informatics group at the U. S. Naval Research Laboratory in Washington, DC. James is currently a Ph.D. candidate studying time series causality and geomagnetic storm prediction at George Mason University in Fairfax, Virginia.

• Preface.- Acknowledgments.- Introduction and Definition of Terms.- Tomography.- Non-Positive Reduced Dynamics.- Complete Positivity.- Physical Motivation of Complete Positivity.- Measures of Complete Positivity.- Negative Channels.- Negative Climates with Diagonal Composite Dynamics.- Rabi Channels.- Physical Motivations for Sharp Operations.- Negative Qubit Channel Examples with Multi-Qubit Baths.- Proposed Experimental Demonstration of Negativity.- Implications of Negative Channels.- Uses for Negative Channels.- Conclusions.- Bibliography.- Author's Biography .