Compression of Entanglement Improves Quantum Communication
(2025) In Laser and Photonics Reviews 19(10).- Abstract
Shared entanglement can significantly amplify classical correlations between systems interacting over a limited quantum channel. A natural avenue is to use entanglement of the same dimension as the channel because this allows for unitary encodings, which preserve global coherence until a measurement is performed. Contrasting this, a distributed task based on a qubit channel is demonstrated, for which irreversible encoding operations can outperform any possible coherence-preserving protocol. This corresponds to using high-dimensional entanglement and encoding information by compressing one of the subsystems into a qubit. Demonstrating this phenomenon requires the preparation of a 4D maximally entangled state, the compression of two... (More)
Shared entanglement can significantly amplify classical correlations between systems interacting over a limited quantum channel. A natural avenue is to use entanglement of the same dimension as the channel because this allows for unitary encodings, which preserve global coherence until a measurement is performed. Contrasting this, a distributed task based on a qubit channel is demonstrated, for which irreversible encoding operations can outperform any possible coherence-preserving protocol. This corresponds to using high-dimensional entanglement and encoding information by compressing one of the subsystems into a qubit. Demonstrating this phenomenon requires the preparation of a 4D maximally entangled state, the compression of two qubits into one and joint qubit-ququart entangled measurements, with all modules executed at near-optimal fidelity. A proof-of-principle experiment is reported that achieves the advantage by realizing separate systems in distinct and independently controlled paths of a single photon. This result demonstrates the relevance of high-dimensional entanglement and non-unitary operations for enhancing the communication capabilities of standard qubit transmissions.
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- author
- Guo, Yu ; Tang, Hao ; Pauwels, Jef ; Cruzeiro, Emmanuel Zambrini ; Hu, Xiao Min ; Liu, Bi Heng ; Huang, Yun Feng ; Li, Chuan Feng ; Guo, Guang Can and Tavakoli, Armin LU
- organization
- publishing date
- 2025-05-22
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- irreversible encoding, photonic high-dimensional entanglement, quantum communication
- in
- Laser and Photonics Reviews
- volume
- 19
- issue
- 10
- article number
- 2401110
- publisher
- Wiley-VCH Verlag
- external identifiers
-
- scopus:85219696692
- ISSN
- 1863-8880
- DOI
- 10.1002/lpor.202401110
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2025 Wiley-VCH GmbH.
- id
- 9b608bc8-f4b7-43d3-a473-d9e19e0950bf
- date added to LUP
- 2025-06-24 15:14:32
- date last changed
- 2025-06-24 15:15:46
@article{9b608bc8-f4b7-43d3-a473-d9e19e0950bf,
abstract = {{<p>Shared entanglement can significantly amplify classical correlations between systems interacting over a limited quantum channel. A natural avenue is to use entanglement of the same dimension as the channel because this allows for unitary encodings, which preserve global coherence until a measurement is performed. Contrasting this, a distributed task based on a qubit channel is demonstrated, for which irreversible encoding operations can outperform any possible coherence-preserving protocol. This corresponds to using high-dimensional entanglement and encoding information by compressing one of the subsystems into a qubit. Demonstrating this phenomenon requires the preparation of a 4D maximally entangled state, the compression of two qubits into one and joint qubit-ququart entangled measurements, with all modules executed at near-optimal fidelity. A proof-of-principle experiment is reported that achieves the advantage by realizing separate systems in distinct and independently controlled paths of a single photon. This result demonstrates the relevance of high-dimensional entanglement and non-unitary operations for enhancing the communication capabilities of standard qubit transmissions.</p>}},
author = {{Guo, Yu and Tang, Hao and Pauwels, Jef and Cruzeiro, Emmanuel Zambrini and Hu, Xiao Min and Liu, Bi Heng and Huang, Yun Feng and Li, Chuan Feng and Guo, Guang Can and Tavakoli, Armin}},
issn = {{1863-8880}},
keywords = {{irreversible encoding; photonic high-dimensional entanglement; quantum communication}},
language = {{eng}},
month = {{05}},
number = {{10}},
publisher = {{Wiley-VCH Verlag}},
series = {{Laser and Photonics Reviews}},
title = {{Compression of Entanglement Improves Quantum Communication}},
url = {{http://dx.doi.org/10.1002/lpor.202401110}},
doi = {{10.1002/lpor.202401110}},
volume = {{19}},
year = {{2025}},
}