Exchange of information between system and environment: facts and myths

Abstract

The exchange of "information" between a system and its environment based on the reduced dynamics is investigated. The association of trace distance with information cannot be stated, because of lack of symmetry between leakage from the system and absorbability by the environment. A measure of loss for the reduced dynamics is established, which may be seen as a deviation from exact unitary dynamics.

6 pages, 8 figures

References in corpus (5)

• Quantum Non-Markovianity: Characterization, Quantification and Detection
• On measures of non-Markovianity: divisibility vs. backflow of information
• Witness for initial system-environment correlations in open system dynamics
• Non-Markovian random unitary qubit dynamics
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Cited by in corpus (7)

• Maximally non-Markovian quantum dynamics without environment backflow of information
• Quantum non-Markovian environment-to-system backflows of information: non-operational vs. operational approaches
• Environment-induced quantum coherence spreading of a qubit
• Quantum non-Markovian "casual bystander" environments
• Memory effects in multipartite systems coupled by non-diagonal dephasing mechanisms
• Hamiltonian characterisation of multi-time processes with classical memory
• Analytical results for the quantum non-Markovianity of spin ensembles undergoing pure dephasing dynamics