Abstract
A general strategy to maintain the coherence of a quantum bit is proposed. The analytical result is derived rigorously including all memory and backaction effects. It is based on an optimized -pulse sequence for dynamic decoupling extending the Carr-Purcell-Meiboom-Gill cycle. The optimized sequence is very efficient, in particular, for strong couplings to the environment.
- Received 26 September 2006
DOI:https://doi.org/10.1103/PhysRevLett.98.100504
©2007 American Physical Society