Gaussian Quantum Integrated Sensing and Communication

@misc{erdogan2026gaussian,
  title = {{Gaussian Quantum Integrated Sensing and Communication}},
  author = {Tuna Erdoğan and Shi-Yuan Wang and Shang-Jen Su and Matthieu R. Bloch},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.04047},
  eprint = {2611.04047},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.04047},
}

TY  - UNPB
TI  - Gaussian Quantum Integrated Sensing and Communication
AU  - Tuna Erdoğan
AU  - Shi-Yuan Wang
AU  - Shang-Jen Su
AU  - Matthieu R. Bloch
PY  - 2026
DA  - 2026/11/02
PB  - arXiv
DO  - 10.48550/arxiv.2611.04047
UR  - https://arxiv.org/abs/2611.04047
AB  - We consider a quantum integrated sensing and communication problem over an optical link in which a low-power transmitter simultaneously communicates with a receiver and identifies the range of a defect producing a backscattered signal. We model the system as a lossy thermal-noise bosonic channel, in which the target, modeled as a beamsplitter, affects the timing of the backscattered signal through its location. Motivated by the envisioned deployment of entanglement-enabled quantum networks, we develop two protocols that allow the transmitter to leverage shared Gaussian entanglement, in the form of independent two-mode squeezed vacuum states or coupled three-mode squeezed vacuum states, to assist both sensing and communication. Since entanglement is known to enhance sensing, as demonstrated in quantum illumination, and to increase communication rates through entanglement-assisted communication, the transmitter faces a trade-off in allocating its entanglement resources between the two tasks. Our main results characterize these trade-offs under the proposed protocols in terms of achievable communication rate/sensing error-exponent regions, which outperform time-sharing schemes and demonstrate a quantum advantage.
ER  -