Please use this identifier to cite or link to this item:
https://doi.org/10.1103/PhysRevA.87.042301
Title: | Vanishing quantum discord is not necessary for completely positive maps | Authors: | Brodutch, A. Datta, A. Modi, K. Rivas, A. Rodríguez-Rosario, C.A. |
Issue Date: | 1-Apr-2013 | Citation: | Brodutch, A., Datta, A., Modi, K., Rivas, A., Rodríguez-Rosario, C.A. (2013-04-01). Vanishing quantum discord is not necessary for completely positive maps. Physical Review A - Atomic, Molecular, and Optical Physics 87 (4) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevA.87.042301 | Abstract: | The description of the dynamics of a system that may be correlated with its environment is only meaningful within the context of a specific framework. Different frameworks rely upon different assumptions about the initial system-environment state. We reexamine the connections between complete positivity and quantum discord within two different sets of assumptions about the relevant family of initial states. We present an example of a system-environment state with nonvanishing quantum discord that leads to a completely positive map. This invalidates an earlier claim about the necessity of vanishing quantum discord for completely positive maps. In our final remarks, we discuss the physical validity of each approach. © 2013 American Physical Society. | Source Title: | Physical Review A - Atomic, Molecular, and Optical Physics | URI: | http://scholarbank.nus.edu.sg/handle/10635/116673 | ISSN: | 10502947 | DOI: | 10.1103/PhysRevA.87.042301 |
Appears in Collections: | Staff Publications |
Show full item record
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.