State Exchange with Quantum Side Information
Name
PhysRevLett.122.010502.pdf
Size
308.4 KB
Format
Adobe PDF
Checksum (MD5)
15749c56aeb5f4ce5ee220ce323c8164
Author(s)
Lee, Yonghae
Takagi, Ryuji
Yamasaki, Hayata
Adesso, Gerardo
Lee, Soojoon
Date Issued
January 2019
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Lee, Yonghae, et al. “State Exchange with Quantum Side Information.” Physical Review Letters, vol. 122, no. 1, Jan. 2019. © 2019 American Physical Society
Version
Final published version
Abstract
We consider a quantum communication task between two users Alice and Bob, in which Alice and Bob exchange their respective quantum information by means of local operations and classical communication assisted by shared entanglement. Here, we assume that Alice and Bob may have quantum side information, not transferred, and classical communication is free. In this work, we derive general upper and lower bounds for the least amount of entanglement which is necessary to perfectly perform this task, called the state exchange with quantum side information. Moreover, we show that the optimal entanglement cost can be negative when Alice and Bob make use of their quantum side information. We finally provide conditions on the initial state for the state exchange with quantum side information which give the exact optimal entanglement cost.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.122.010502
