Coherent observer engineering for protecting quantum information

Yu Pan (1) , Thien Nguyen (2) , Zibo Miao (3) , Nina H. Amini (4, 5, 6) , Valeri Ugrinovski (1) , Matthew R. James (2)

1 UNSW - University of New South Wales [Canberra Campus]
2 ANU - Australian National University - Department of engineering
3 University of Melbourne
4 L2S - Laboratoire des signaux et systèmes
5 CNRS - Centre National de la Recherche Scientifique
6 CentraleSupélec

In this paper, we extend the applicability of coherent quantum observers to enable the generation of decoherence free subsystem which can be used for quantum information storage. In particular, a general quantum linear passive system can be equipped with a decoherence free subsystem by placing some of its poles on the imaginary axis via engineered observer-based controller. The controller design for the case of optical cavity systems is illustrated in the context of examples.

Domains: Optimization and Control [math.OC]; Quantum Physics [quant-ph]

Yu Pan, Thien Nguyen, Zibo Miao, Nina H. Amini, Valeri Ugrinovski, et al.. Coherent observer engineering for protecting quantum information. Chineese Control Conference (CCC), Jul 2016, Chengdu, China. ⟨10.1109/chicc.2016.7554812⟩. ⟨hal-01398831⟩