Work

Non-Markovianity and reservoir memory of quantum channels: a quantum information theory perspective

Year: 2014

Type: article

Abstract: Quantum technologies rely on the ability to coherently transfer information encoded in quantum states along quantum channels. Decoherence induced by the environment sets limits on the efficiency of any quantum-enhanced protocol. Generally, the longer a quantum channel is the worse its capacity is. We show that for non-Markovian quantum channels this is not always true: surprisingly the capacity of a longer channel can be greater than of a shorter one. We introduce a general theoretical framework linking non-Markovianity to the capacities of quantum channels and demonstrate how harnessing non-Markovianity may improve the efficiency of quantum information processing and communication.

Source: Scientific Reports

DOI: 10.1038/srep05720

Authors: B. Bylicka, D. Chruściński, S. Maniscalco

Institutions: Nicolaus Copernicus University, University of Turku

Language: English

Topic: Quantum Information and Cryptography

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,690

Funders: Heriot-Watt University, Suomen Kulttuurirahasto, Emil Aaltosen Säätiö, Engineering and Physical Sciences Research Council