Quantum-Enhanced Transmittance Sensing

Zihao Gong, Nathaniel Rodriguez, Christos N. Gagatsos, Saikat Guha, Boulat A. Bash

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


We consider the problem of estimating unknown transmittance $\theta$ of a target bathed in thermal background light. As quantum estimation theory yields the fundamental limits, we employ the lossy thermal-noise bosonic channel model, which describes sensor-target interaction quantum mechanically in many practical active-illumination systems (e.g., using emissions at optical, microwave, or radio frequencies). We prove that quantum illumination using two-mode squeezed vacuum (TMSV) states asymptotically achieves minimal quantum Cramér-Rao bound (CRB) over all quantum states (not necessarily Gaussian) in the limit of low transmitted power. We characterize the optimal receiver structure for TMSV input, and show its advantage over other receivers using both analysis and Monte Carlo simulation.

Original languageEnglish (US)
Pages (from-to)473-490
Number of pages18
JournalIEEE Journal on Selected Topics in Signal Processing
Issue number2
StatePublished - Mar 1 2023


  • Channel estimation
  • loss measurement
  • quantum Cramér-Rao bound
  • quantum estimation theory
  • quantum illumination
  • quantum information science
  • quantum radar
  • quantum receiver design
  • transmittance measurement

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering


Dive into the research topics of 'Quantum-Enhanced Transmittance Sensing'. Together they form a unique fingerprint.

Cite this