Flow of quantum correlations in noisy two-mode squeezed microwave states
Michael Renger, Stefan Pogorzalek, Florian Fesquet, Kedar Honasoge, Fabian Kronowetter, Q. Chen, Yuki Nojiri, K. Inomata, Yasunobu Nakamura, Achim Marx, Frank Deppe, R. Gross, Kirill G. Fedorov · Physical Review A · 2022
The authors experimentally investigate the behavior of quantum discord and entanglement in two-mode squeezed states generated by superconducting Josephson parametric amplifiers. They show how correlations flow between the two modes and the noisy environment, and relate their findings to the security of entanglement-based quantum key distribution.