Detection of quantum non-Markovianity close to the Born-Markov approximation

• URL: http://arxiv.org/abs/2001.01738v1
• Date: Mon, 6 Jan 2020 19:01:11 GMT
• Title: Detection of quantum non-Markovianity close to the Born-Markov approximation
• Authors: Thais de Lima Silva, Stephen P. Walborn, Marcelo F. Santos, Gabriel H. Aguilar, and Adri\'an A. Budini
• Abstract summary: We calculate the conditional past-future correlation for the decay dynamics of a two-level system in a bosonic bath. In contrast to quantum memory measures based solely on system propagator properties, here memory effects are related to a convolution structure involving two system propagators and the environment correlation.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We calculate in an exact way the conditional past-future correlation for the decay dynamics of a two-level system in a bosonic bath. Different measurement processes are considered. In contrast to quantum memory measures based solely on system propagator properties, here memory effects are related to a convolution structure involving two system propagators and the environment correlation. This structure allows to detect memory effects even close to the validity of the Born-Markov approximation. An alternative operational-based definition of environment-to-system backflow of information follows from this result. We provide experimental support to our results by implementing the dynamics and measurements in a photonic experiment.

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