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Reveal non-Markovianity of open quantum systems via local operations

Yang, Huan and Miao, Haixing and Chen, Yanbei (2011) Reveal non-Markovianity of open quantum systems via local operations. , Pasadena, CA. (Submitted)

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Non-Markovianity, as an important feature of general open quantum systems, is usually difficult to quantify with limited knowledge of how the plant that we are interested in interacts with its environment-the bath. It often happens that the reduced dynamics of the plant attached to a non-Markovian bath becomes indistinguishable from the one with a Markovian bath, if we left the entire system freely evolve. Here we show that non-Markovianity can be revealed via applying local unitary operations on the plant-they will influence the plant evolution at later times due to memory of the bath. This not only provides a new criterion for non-Markovianity, but also sheds light on protecting and recovering quantum coherence in non-Markovian systems, which will be useful for quantum-information processing.

Item Type:Report or Paper (Discussion Paper)
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Additional Information:We thank S.L. Danilishin, F.Ya, Kahlili and other colleagues in the LIGO MQM group for fruitful discussions. This work has been supported by NSF grants PHY-0555406, PHY-0653653, PHY-0601459, PHY-0956189, PHY-1068881, as well as the David and Barbara Groce startup fund at Caltech.
Group:IQIM, Institute for Quantum Information and Matter, TAPIR
Funding AgencyGrant Number
NSF PHY-0956189
David and Lucile Packard FoundationUNSPECIFIED
Record Number:CaltechAUTHORS:20121102-100208411
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:35259
Deposited By: Tony Diaz
Deposited On:03 Nov 2012 05:02
Last Modified:17 Dec 2014 18:41

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