Ringbauer M, Wood C J, Modi K, Gilchrist A, White A G, Fedrizzi A
Centre for Engineered Quantum Systems, School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia.
Centre for Quantum Computer and Communication Technology, School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia.
Phys Rev Lett. 2015 Mar 6;114(9):090402. doi: 10.1103/PhysRevLett.114.090402. Epub 2015 Mar 4.
We fully characterize the reduced dynamics of an open quantum system initially correlated with its environment. Using a photonic qubit coupled to a simulated environment, we tomographically reconstruct a superchannel-a generalized channel that treats preparation procedures as inputs-from measurement of the system alone. We introduce novel quantitative measures for determining the strength of initial correlations, and to allow an experiment to be optimized in regard to its environment.
