Quantum-enhanced noise radar
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TLDR
In this article, a two-mode squeezed state, which exhibits continuous-variable entanglement between so-called signal and idler beams, is used as input to the radar system.Abstract:
We propose a protocol for quantum illumination: a quantum-enhanced noise radar. A two-mode squeezed state, which exhibits continuous-variable entanglement between so-called signal and idler beams, is used as input to the radar system. Compared to existing proposals for quantum illumination, our protocol does not require joint measurement of the signal and idler beams. This greatly enhances the practicality of the system by, for instance, eliminating the need for a quantum memory to store the idler. We perform a proof-of-principle experiment in the microwave regime, directly comparing the performance of a two-mode squeezed source to an ideal classical noise source that saturates the classical bound for correlation. We find that, even in the presence of significant added noise and loss, the quantum source outperforms the classical source by as much as an order of magnitude.read more
Citations
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Detecting a Target With Quantum Entanglement
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Entangling two microwave modes via optomechanics
Qizhi Cai,Jinkun Liao,Qiang Zhou +2 more
TL;DR: In this paper, a hybrid system consisting of a mechanical resonator, an optical Fabry-P\'erot cavity, and two superconducting microwave circuits was proposed to generate stationary continuous-variable quantum entanglement between two microwave modes.
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Quantum illumination assistant with error-correcting codes
TL;DR: This scheme gives lower error probability and higher signal-to-noise ratio (SNR) in comparison with the conventional entanglement protocols, and further investigates the interplay between the SNR and the detection efficiency in quantum target recognition.
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Opportunities and Challenges of Quantum Radar
Marco Lanzagorta,Jeffrey Uhlmann +1 more
TL;DR: A back-of-the-envelope and implementation-agnostic analysis is provided to glimpse the kinds of expected improvement that a quantum radar could provide for applications of interest and believes it provides evidence that in some contexts quantum radar can be expected to offer realizable practical advantages over classical alternatives.
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Bounds on Probability of Detection Error in Quantum-Enhanced Noise Radar
TL;DR: In this article, a model of quantum-enhanced noise radar is presented enabling a similar analysis, and a bound on the probability of an error in target detection is shown to match that of the optimal classical-state scheme.
References
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TL;DR: The dynamical Casimir effect is observed in a superconducting circuit consisting of a coplanar transmission line with a tunable electrical length and two-mode squeezing in the emitted radiation is detected, which is a signature of the quantum character of the generation process.
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Enhanced Sensitivity of Photodetection via Quantum Illumination
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