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Information capacity of quantum communication under natural physical assumptions

Pauwels, Jef ; Pironio, Stefano and Tavakoli, Armin LU (2025) In Quantum 9.
Abstract

The quantum prepare-and-measure scenario has been studied under various physical assumptions on the emitted states. Here, we first discuss how different assumptions are conceptually and formally related. We then identify one that can serve as a relaxation of all others, corresponding to a limitation on the one-shot accessible information of the state ensemble. This motivates us to study the optimal state discrimination probability of a source subject to these various physical assumptions. We derive general and tight bounds for states restricted by their quantum dimension, their vacuum component, an arbitrary uniform overlap, the magnitude of higher-dimensional signals and the experimenter’s trust in their device. Our results constitute... (More)

The quantum prepare-and-measure scenario has been studied under various physical assumptions on the emitted states. Here, we first discuss how different assumptions are conceptually and formally related. We then identify one that can serve as a relaxation of all others, corresponding to a limitation on the one-shot accessible information of the state ensemble. This motivates us to study the optimal state discrimination probability of a source subject to these various physical assumptions. We derive general and tight bounds for states restricted by their quantum dimension, their vacuum component, an arbitrary uniform overlap, the magnitude of higher-dimensional signals and the experimenter’s trust in their device. Our results constitute a first step towards a more unified picture of semi-device-independent quantum information processing.

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Please use this url to cite or link to this publication:
author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Quantum
volume
9
publisher
Verein zur Forderung des Open Access Publizierens in den Quantenwissenschaften
external identifiers
  • scopus:85219041134
ISSN
2521-327X
DOI
10.22331/q-2025-02-18-1637
language
English
LU publication?
yes
id
59361eea-660d-454a-b7b8-499ea64bb313
date added to LUP
2025-06-30 10:49:55
date last changed
2025-06-30 10:49:55
@article{59361eea-660d-454a-b7b8-499ea64bb313,
  abstract     = {{<p>The quantum prepare-and-measure scenario has been studied under various physical assumptions on the emitted states. Here, we first discuss how different assumptions are conceptually and formally related. We then identify one that can serve as a relaxation of all others, corresponding to a limitation on the one-shot accessible information of the state ensemble. This motivates us to study the optimal state discrimination probability of a source subject to these various physical assumptions. We derive general and tight bounds for states restricted by their quantum dimension, their vacuum component, an arbitrary uniform overlap, the magnitude of higher-dimensional signals and the experimenter’s trust in their device. Our results constitute a first step towards a more unified picture of semi-device-independent quantum information processing.</p>}},
  author       = {{Pauwels, Jef and Pironio, Stefano and Tavakoli, Armin}},
  issn         = {{2521-327X}},
  language     = {{eng}},
  publisher    = {{Verein zur Forderung des Open Access Publizierens in den Quantenwissenschaften}},
  series       = {{Quantum}},
  title        = {{Information capacity of quantum communication under natural physical assumptions}},
  url          = {{http://dx.doi.org/10.22331/q-2025-02-18-1637}},
  doi          = {{10.22331/q-2025-02-18-1637}},
  volume       = {{9}},
  year         = {{2025}},
}