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Analog-to-digital conversion in the quantum regime — arXiv:2609.07643

Source: arXiv (en)
Original: https://arxiv.org/abs/2609.07643
License (as archived): CC0-1.0
Archived: 2026-10-16T15:44:25.638Z
SHA-256 of the archived text: 32d2a44f74211b0ca48d0a928d43a719804f56830b9b838c4dc1d9a5e01fb591
Stable URL of this page: https://metraipolis.com/documento/dc_be79e70f87bb

How to cite

Analog-to-digital conversion in the quantum regime — arXiv:2609.07643 — arXiv (en), https://arxiv.org/abs/2609.07643 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_be79e70f87bb (Metraipolis archive dc_be79e70f87bb, sha256 32d2a44f74211b0ca48d0a928d43a719804f56830b9b838c4dc1d9a5e01fb591)

BibTeX

@misc{dcbe79e70f87bb,
  title = {Analog-to-digital conversion in the quantum regime — arXiv:2609.07643},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2609.07643},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_be79e70f87bb; sha256 32d2a44f74211b0ca48d0a928d43a719804f56830b9b838c4dc1d9a5e01fb591},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2609.07643. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Digital signal processing has become essential in quantum optics, particularly for continuous-variable (CV) information encoding, enabling coherent detection schemes and mitigation of linear impairments. While linear signal processing in double homodyne detection has been studied under the assumption that all post-measurement processing can be backpropagated in the optical domain, a rigorous treatment of the digitization chain, spanning optical, electronic, and sampling stages, is still lacking. In this work, we consider the continuous mode description of double homodyne detection to fully capture the maximum mode-matching coefficient achievable as a function of electronic noise, signal bandwidth, receiver electronics bandwidth, and sampling rate, that is the entry point of digital signal processing. We establish a dimensioning rule that generalizes the Nyquist-Shannon criterion to account for quantum fluctuations of the measured signal, not merely its bandwidth. Analyzing the case of additive white electronic noise, we find numerically that optimal signal-to-noise ratio is achieved when the electronic bandwidth is large enough to pass the signal yet narrower than the sampling rate in order to mitigate noise amplification, yielding a concrete design criterion for coherent detection.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-09-09 in quant-ph).
Categorie arXiv: Quantum Physics (quant-ph) ; Optics (physics.optics).
Pagina del lavoro: https://arxiv.org/abs/2609.07643 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-16T15:32:34.812Z dalla pagina https://arxiv.org/catchup/quant-ph/2026-09-09?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).