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Quantum-Enhanced Transmittance Sensing
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DOI：10.1109/JSTSP.2022.3222680.png)
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Abstract
En 中文
We consider the problem of estimating unknown transmittance. 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 Cramer-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.
Keywords:
Sensors
Probes
Quantum mechanics
Photonics
Optical signal processing
Optical sensors
Transceivers
Channel estimation
loss measurement
quantum Cramer-Rao bound
quantum estimation theory
quantum illumination
quantum information science
quantum radar
quantum receiver design
transmittance measurement
Journal
IF:
13.7
Papers:
1.9K
Citations:
1.1W