Demonstration of bang-bang control for decoherence suppression with NMR

Event: 
IICQI 2007
Speaker(s): 
Talk type: 
Invited
Abstract: 

A quantum system with finite degrees of freedom can simulate a composite of a system and its environment if the state of the hypothetical environment is randomized by external manipulations. We propose to examine various techniques in quantum information processing under noisy environment. A concrete example in which a qubit under artificially generated noise is considered. It is shown both theoretically and experimentally that bang-bang control employing multiple short pulses suppresses decoherence. We demonstrate this using an NMR quantum computer and verify the validity of the theory.

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