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Q: Fachverband Quantenoptik und Photonik
Q 33: Quantum Information (Quantum Computing) II
Q 33.2: Talk
Wednesday, March 13, 2019, 14:30–14:45, S HS 001 Chemie
Non-Markovianity from a mixture of unitaries: implementation on IBM’s quantum computer platforms — •Giulio Amato1,2,3, Filip Wudarski1, Panagiotis Kl. Barkoutsos4, Bassano Vacchini3,5, Heinz-Peter Breuer1, and Andreas Buchleitner1 — 1Albert-Ludwigs-Universität Freiburg — 2Universitá degli Studi di Parma — 3Istituto Nazionale di Fisica Nucleare — 4IBM Research, Zurich Research Laboratory — 5Universitá degli Studi di Milano
Can a convex combination of quantum Markovian processes lead to a non-Markovian one? Indeed this is the case. It has been shown that also mixing two unitary evolutions can generate quantum memory effects, due to the build up of correlations between the system of interest and an ancillary degree of freedom [1]. We devise a protocol to experimentally resolve and monitor this phenomenon, by controlled transformations on a composite quantum system. We implement this approach on IBM’s quantum computers.
[1] H.-P. Breuer, G. Amato & B. Vacchini, Mixing-induced quantum non-Markovianity and information flow, New J. Phys. 20, 043007 (2018)