Why and how should we control decoherence?†

^†In memory of Lorenzo Narducci, friend, colleague, scientist.

Abstract

We present the principles of universal dynamical control of open quantum systems aimed at optimally suppressing their decoherence. Several basic scenarios of this control are discussed. Our results indicate that very limited knowledge regarding the system–environment correlation is sufficient to implement control that would suppress decoherence and bring out quantum behavior in complex macroscopic systems that are embedded in thermal noisy environments.

^†In memory of Lorenzo Narducci, friend, colleague, scientist.

Keywords:

• decoherence control
• dynamical control
• multipartite decoherence
• quantum information

Acknowledgements

We acknowledge the support of DIP, GIF and EC (SCALA IP and MIDAS STREP).

Notes

^†In memory of Lorenzo Narducci, friend, colleague, scientist.