Exchange of information between system and environment: Facts and myths
Quantum Research Group, School of Chemistry and Physics, University of KwaZulu-Natal Durban 4001, South Africa and National Institute for Theoretical Physics (NITheP) - KwaZulu-Natal, South Africa
Received: 30 January 2016
Accepted: 7 March 2016
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.
PACS: 03.65.Yz – Decoherence; open systems; quantum statistical methods / 03.67.-a – Quantum information
© EPLA, 2016