Covert sensing using floodlight illumination

Christos N. Gagatsos, Boulat A. Bash, Animesh Datta, Zheshen Zhang, Saikat Guha

Research output: Contribution to journalArticle

Abstract

We propose a scheme for covert active sensing using floodlight illumination from a terahertz-bandwidth amplified spontaneous emission (ASE) source and heterodyne detection. We evaluate the quantum-estimation-theoretic performance limit of covert sensing, wherein a transmitter's attempt to sense a target phase is kept undetectable to a quantum-equipped passive adversary, by hiding the signal photons under the thermal noise floor. Despite the quantum state of each mode of the ASE source being mixed (thermal), and hence inferior compared to the pure coherent state of a laser mode, the thousand-times-higher optical bandwidth of the ASE source results in achieving a substantially superior performance compared to a narrow-band laser source by allowing the probe light to be spread over many more orthogonal temporal modes within a given integration time. Even though our analysis is restricted to single-mode phase sensing, this system could be applicable or extendible for various practical optical sensing applications.

Original languageEnglish (US)
Article number062321
JournalPhysical Review A
Volume99
Issue number6
DOIs
StatePublished - Jun 18 2019

Fingerprint

Floodlighting
Spontaneous emission
Lighting
illumination
bandwidth
Bandwidth
spontaneous emission
Thermal noise
Laser modes
Light sources
Transmitters
Photons
thermal noise
laser modes
light beams
Lasers
transmitters
narrowband
Heterodyne detection
photons

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Gagatsos, C. N., Bash, B. A., Datta, A., Zhang, Z., & Guha, S. (2019). Covert sensing using floodlight illumination. Physical Review A, 99(6), [062321]. https://doi.org/10.1103/PhysRevA.99.062321

Covert sensing using floodlight illumination. / Gagatsos, Christos N.; Bash, Boulat A.; Datta, Animesh; Zhang, Zheshen; Guha, Saikat.

In: Physical Review A, Vol. 99, No. 6, 062321, 18.06.2019.

Research output: Contribution to journalArticle

Gagatsos, CN, Bash, BA, Datta, A, Zhang, Z & Guha, S 2019, 'Covert sensing using floodlight illumination', Physical Review A, vol. 99, no. 6, 062321. https://doi.org/10.1103/PhysRevA.99.062321
Gagatsos, Christos N. ; Bash, Boulat A. ; Datta, Animesh ; Zhang, Zheshen ; Guha, Saikat. / Covert sensing using floodlight illumination. In: Physical Review A. 2019 ; Vol. 99, No. 6.
@article{5226e82f61404983a593feec6371a616,
title = "Covert sensing using floodlight illumination",
abstract = "We propose a scheme for covert active sensing using floodlight illumination from a terahertz-bandwidth amplified spontaneous emission (ASE) source and heterodyne detection. We evaluate the quantum-estimation-theoretic performance limit of covert sensing, wherein a transmitter's attempt to sense a target phase is kept undetectable to a quantum-equipped passive adversary, by hiding the signal photons under the thermal noise floor. Despite the quantum state of each mode of the ASE source being mixed (thermal), and hence inferior compared to the pure coherent state of a laser mode, the thousand-times-higher optical bandwidth of the ASE source results in achieving a substantially superior performance compared to a narrow-band laser source by allowing the probe light to be spread over many more orthogonal temporal modes within a given integration time. Even though our analysis is restricted to single-mode phase sensing, this system could be applicable or extendible for various practical optical sensing applications.",
author = "Gagatsos, {Christos N.} and Bash, {Boulat A.} and Animesh Datta and Zheshen Zhang and Saikat Guha",
year = "2019",
month = "6",
day = "18",
doi = "10.1103/PhysRevA.99.062321",
language = "English (US)",
volume = "99",
journal = "Physical Review A",
issn = "2469-9926",
publisher = "American Physical Society",
number = "6",

}

TY - JOUR

T1 - Covert sensing using floodlight illumination

AU - Gagatsos, Christos N.

AU - Bash, Boulat A.

AU - Datta, Animesh

AU - Zhang, Zheshen

AU - Guha, Saikat

PY - 2019/6/18

Y1 - 2019/6/18

N2 - We propose a scheme for covert active sensing using floodlight illumination from a terahertz-bandwidth amplified spontaneous emission (ASE) source and heterodyne detection. We evaluate the quantum-estimation-theoretic performance limit of covert sensing, wherein a transmitter's attempt to sense a target phase is kept undetectable to a quantum-equipped passive adversary, by hiding the signal photons under the thermal noise floor. Despite the quantum state of each mode of the ASE source being mixed (thermal), and hence inferior compared to the pure coherent state of a laser mode, the thousand-times-higher optical bandwidth of the ASE source results in achieving a substantially superior performance compared to a narrow-band laser source by allowing the probe light to be spread over many more orthogonal temporal modes within a given integration time. Even though our analysis is restricted to single-mode phase sensing, this system could be applicable or extendible for various practical optical sensing applications.

AB - We propose a scheme for covert active sensing using floodlight illumination from a terahertz-bandwidth amplified spontaneous emission (ASE) source and heterodyne detection. We evaluate the quantum-estimation-theoretic performance limit of covert sensing, wherein a transmitter's attempt to sense a target phase is kept undetectable to a quantum-equipped passive adversary, by hiding the signal photons under the thermal noise floor. Despite the quantum state of each mode of the ASE source being mixed (thermal), and hence inferior compared to the pure coherent state of a laser mode, the thousand-times-higher optical bandwidth of the ASE source results in achieving a substantially superior performance compared to a narrow-band laser source by allowing the probe light to be spread over many more orthogonal temporal modes within a given integration time. Even though our analysis is restricted to single-mode phase sensing, this system could be applicable or extendible for various practical optical sensing applications.

UR - http://www.scopus.com/inward/record.url?scp=85068151571&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85068151571&partnerID=8YFLogxK

U2 - 10.1103/PhysRevA.99.062321

DO - 10.1103/PhysRevA.99.062321

M3 - Article

AN - SCOPUS:85068151571

VL - 99

JO - Physical Review A

JF - Physical Review A

SN - 2469-9926

IS - 6

M1 - 062321

ER -