Beating the classical limits of information transmission using a quantum decoder
Name
PhysRevA.97.012315.pdf
Size
1.42 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Chapman, Robert J.
Karim, Akib
Huang, Zixin
Tomamichel, Marco
Peruzzo, Alberto
Flammia, Steven Thomas
Date Issued
January 2018
Journal
Physical Review A
Publisher
American Physical Society
Citation
Chapman, Robert J., et al. “Beating the Classical Limits of Information Transmission Using a Quantum Decoder.” Physical Review A, vol. 97, no. 1, Jan. 2018. © 2018 American Physical Society
Version
Final published version
Abstract
Encoding schemes and error-correcting codes are widely used in information technology to improve the reliability of data transmission over real-world communication channels. Quantum information protocols can further enhance the performance in data transmission by encoding a message in quantum states; however, most proposals to date have focused on the regime of a large number of uses of the noisy channel, which is unfeasible with current quantum technology. We experimentally demonstrate quantum enhanced communication over an amplitude damping noisy channel with only two uses of the channel per bit and a single entangling gate at the decoder. By simulating the channel using a photonic interferometric setup, we experimentally increase the reliability of transmitting a data bit by greater than 20% for a certain damping range over classically sending the message twice. We show how our methodology can be extended to larger systems by simulating the transmission of a single bit with up to eight uses of the channel and a two-bit message with three uses of the channel, predicting a quantum enhancement in all cases.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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/PhysRevA.97.012315
