Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:1305.4162 · Journal of Applied Physics

Super-resolving quantum radar: Coherent-state sources with homodyne detection suffice to beat the diffraction limit

Kebei Jiang, Hwang Lee, Christopher C. Gerry, Jonathan P. Dowling

Published Nov 15, 2013• 58 citations
arXivHTMLPDF

Abstract

There has been much recent interest in quantum metrology for applications to sub-Raleigh ranging and remote sensing such as in quantum radar. For quantum radar, atmospheric absorption and diffraction rapidly degrades any actively transmitted quantum states of light, such as N00N states, so that for this high-loss regime the optimal strategy is to transmit coherent states of light, which suffer no worse loss than the linear Beer's law for classical radar attenuation, and which provide sensitivity at the shot-noise limit in the returned power. We show that coherent radar radiation sources, coupled with a quantum homodyne detection scheme, provide both longitudinal and angular super-resolution much below the Rayleigh diffraction limit, with sensitivity at shot-noise in terms of the detected photon power. Our approach provides a template for the development of a complete super-resolving quantum radar system with currently available technology.

DOI
10.1063/1.4829016

Related papers

Super-Resolving Quantum Radar: Coherent-State Sources with Homodyne Detection Suffice to Beat the Diffraction Limit

Kebei Jiang, Hwang Lee, Christopher C. Gerry +1 more

We show that coherent radar radiation sources, coupled with a quantum homodyne detection scheme, provide both longitudinal and angular super-resolution much below the Rayleigh diffraction limit, with sensitivity at the shot-noise limit.

The Rochester Conferences on Coherence and Quantum Optics and the Quantum Information and Measurement meeting•Jan 1, 2013•4 citations

Super-resolution at the shot-noise limit with coherent states and photon-number-resolving detectors

Yang Gao, Petr M. Anisimov, Christoph F. Wildfeuer +3 more

There has been much recent interest in quantum optical interferometry for applications to metrology, subwavelength imaging, and remote sensing such as in quantum laser radar (LADAR). For quantum LADAR, atmospheric absorption rapidly degrades any quantum state of light, so that for high-photon loss the optimal strategy is to transmit coherent states of light, which suffer no worse loss than the Beer law for classical optical attenuation, and which provides sensitivity at the shot-noise limit. We show that coherent light coupled with photon-number-resolving detectors can provide a super-resolution much below the Rayleigh diffraction limit, with sensitivity no worse than shot noise in terms of the detected photon power.

arXiv:0907.2382•Journal of the Optical Society of America B•May 13, 2010•71 citations

Influence of atmosphere attenuation on quantum interferometric radar

Shu Wang, Yichong Ren, Rao Rui-zhong +1 more

There has been aroused much interest in quantum metrology such as quantum radar, due to its applications in sub-Raleigh ranging and remote sensing. For quantum radar, the atmospheric absorption and diffraction rapidly degrade any actively transmitted quantum states of light, such as N00N and MM' states. Thus for the high-loss condition, the optimal strategy is to transmit coherent state of light, which can only provide sensitivity at the shot-noise limit but suffer no worse loss than the linear Beer's law for classical radar attenuation. In this paper, the target detection theory of quantum interferometric radar in the presence of photon loss is thoroughly investigated with the model of Mach-Zehnder interferometer, and the dynamic evolution of the quantum light field in the detecting process is also investigated. We utilize the parity operator to detect the return signal of quantum interferometric radar with coherent-state source. Then we compare the detection result of quantum radar with that of classical radar, which proves that the quantum radar scheme that employs coherent radiation sources and parity operator detection can provide an N-fold super-resolution, which is much below the Rayleigh diffraction limit; besides, the sensitivity of this scheme can also achieve the shot-noise-limit. Also, we analyze the effect of atmospheric attenuation on the performance of quantum radar, and find that the sensitivity is seriously influenced by atmospheric attenuation:only when the reference beam and the detection beam have the same transmissivity, will the sensitivity increase monotonically with increasing the photon number per pulse N, otherwise it first increases and then decreases with increasing N. Further, the sensivity is directly proportional to 1/N for the first case. In conclusion, we investigate the effects of atmospheric absorption on the resolution and sensitivity of quantum radar, and find that one can overcome the harmful effects of atmospheric attenuation by adjusting the transmissivity of reference beam to the atmospheric transmittance.

Acta Physica Sinica•Jan 1, 2017•6 citations

Super-resolving quantum LADAR with even coherent states sources at shot noise limit

Qiang Wang, Yong an Zhang, Xu Yang +6 more

We have derived a quantum LADAR scheme which exploits even coherent states of light, is shot noise limit in sensitivity and can resolve features much below Rayleigh diffraction limit. For a return power of n = 100, the resolution of our proposed scheme can reach 120 times higher than the classical diffraction limit in the sense of the well-define narrow feature. More importantly, our scheme has the super-resolving characteristics in the usual sense of word as there are multiple narrow peaks as would be the case in a N00N-states scheme.

International Conference on Optoelectronics and Microelectronics•Jul 1, 2015•3 citations

Phase measurements exhibiting super sensitivity and super resolution features

Clemens Schäfermeier, Miroslav Ježek, Tobias Gehring +1 more

By using an optical squeezed state and a post-processed homodyne detection scheme we show that phase measurements can overcome Rayleigh’s resolution criterion and beat the quantum shot noise limit simultaneously.

Conference on Lasers and Electro-Optics•Jan 1, 2016•0 citations

Design considerations for quantum radar implementation

Matthew J. Bradsema, Ram M. Narayanan, Marco O. Lanzagorta

Quantum radar serves to drastically improve the resolution of current radar technology using quantum phenomena. This paper will first review some of the proposed ideas and engineering designs behind both entanglement radar and coherent state radar design schemes. Entanglement radar is based on first entangling two photons, then sending one of the entangled photons out towards the target, and keeping the other one at home. A correlation between the two photons is analyzed to obtain information. Coherent state quantum radar relies on using coherent state photons and a quantum detection scheme in order to beat the diffraction limit. Based on the above, a proposed design concept to implement of a coherent state quantum radar is presented for simultaneously determining target range and azimuth/elevation angles.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•May 29, 2014•16 citations
There has been much recent interest in quantum metrology for applications to sub-Raleigh ranging and remote sensing such as in quantum radar. For quantum radar, atmospheric absorption and diffraction rapidly degrades any actively transmitted quantum states of light, such as N00N states, so that for this high-loss regime the optimal strategy is to transmit coherent states of light, which suffer no worse loss than the linear Beer's law for classical radar attenuation, and which provide sensitivity at the shot-noise limit in the returned power. We show that coherent radar radiation sources, coupled with a quantum homodyne detection scheme, provide both longitudinal and angular super-resolution much below the Rayleigh diffraction limit, with sensitivity at shot-noise in terms of the detected photon power. Our approach provides a template for the development of a complete super-resolving quantum radar system with currently available technology.
There has been much recent interest in quantum optical interferometry for applications to metrology, subwavelength imaging, and remote sensing such as in quantum laser radar (LADAR). For quantum LADAR, atmospheric absorption rapidly degrades any quantum state of light, so that for high-photon loss the optimal strategy is to transmit coherent states of light, which suffer no worse loss than the Beer law for classical optical attenuation, and which provides sensitivity at the shot-noise limit. We show that coherent light coupled with photon-number-resolving detectors can provide a super-resolution much below the Rayleigh diffraction limit, with sensitivity no worse than shot noise in terms of the detected photon power.
There has been aroused much interest in quantum metrology such as quantum radar, due to its applications in sub-Raleigh ranging and remote sensing. For quantum radar, the atmospheric absorption and diffraction rapidly degrade any actively transmitted quantum states of light, such as N00N and MM' states. Thus for the high-loss condition, the optimal strategy is to transmit coherent state of light, which can only provide sensitivity at the shot-noise limit but suffer no worse loss than the linear Beer's law for classical radar attenuation. In this paper, the target detection theory of quantum interferometric radar in the presence of photon loss is thoroughly investigated with the model of Mach-Zehnder interferometer, and the dynamic evolution of the quantum light field in the detecting process is also investigated. We utilize the parity operator to detect the return signal of quantum interferometric radar with coherent-state source. Then we compare the detection result of quantum radar with that of classical radar, which proves that the quantum radar scheme that employs coherent radiation sources and parity operator detection can provide an N-fold super-resolution, which is much below the Rayleigh diffraction limit; besides, the sensitivity of this scheme can also achieve the shot-noise-limit. Also, we analyze the effect of atmospheric attenuation on the performance of quantum radar, and find that the sensitivity is seriously influenced by atmospheric attenuation:only when the reference beam and the detection beam have the same transmissivity, will the sensitivity increase monotonically with increasing the photon number per pulse N, otherwise it first increases and then decreases with increasing N. Further, the sensivity is directly proportional to 1/N for the first case. In conclusion, we investigate the effects of atmospheric absorption on the resolution and sensitivity of quantum radar, and find that one can overcome the harmful effects of atmospheric attenuation by adjusting the transmissivity of reference beam to the atmospheric transmittance.
We have derived a quantum LADAR scheme which exploits even coherent states of light, is shot noise limit in sensitivity and can resolve features much below Rayleigh diffraction limit. For a return power of n = 100, the resolution of our proposed scheme can reach 120 times higher than the classical diffraction limit in the sense of the well-define narrow feature. More importantly, our scheme has the super-resolving characteristics in the usual sense of word as there are multiple narrow peaks as would be the case in a N00N-states scheme.
Quantum radar serves to drastically improve the resolution of current radar technology using quantum phenomena. This paper will first review some of the proposed ideas and engineering designs behind both entanglement radar and coherent state radar design schemes. Entanglement radar is based on first entangling two photons, then sending one of the entangled photons out towards the target, and keeping the other one at home. A correlation between the two photons is analyzed to obtain information. Coherent state quantum radar relies on using coherent state photons and a quantum detection scheme in order to beat the diffraction limit. Based on the above, a proposed design concept to implement of a coherent state quantum radar is presented for simultaneously determining target range and azimuth/elevation angles.