English

Quantum information aspects of approximate position measurement

Quantum Physics 2022-04-04 v1 Mathematical Physics math.MP

Abstract

We perform a quantum information analysis for multi-mode Gaussian approximate position measurements, underlying noisy homodyning in quantum optics. The "Gaussian maximizer" property is established for the entropy reduction of these measurements which provides explicit formulas for computations including their entanglement-assisted capacity. The case of one mode is discussed in detail.

Keywords

Cite

@article{arxiv.2006.04383,
  title  = {Quantum information aspects of approximate position measurement},
  author = {A. S. Holevo and V. I. Yashin},
  journal= {arXiv preprint arXiv:2006.04383},
  year   = {2022}
}

Comments

18 pages, one figure

R2 v1 2026-06-23T16:08:11.130Z