Quantum-enhanced noise radar

By C. W. S. Chang, A. Vadiraj, J. Bourassa, B. Balaji, Christopher M. Wilson. Applied Physics Letters, 2018

153 citations recorded by the source corpus.

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.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.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/cebaddb87b45f12cebc5efaa09b3e875d3884d34

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Citations in the corpus

Circuit quantum electrodynamics (2020, background): “…in that frequency range would find a number of applications, including in quantum information processing (Kimble, 2008; Narla et al., 2016), for quantum radars (Barzanjeh et al., 2015; Barzanjeh et al., 2019; Chang et al., 2019), and for the detection of dark matter axions (Lamoreaux et al., 2013).”
Quantum technology for military applications (2021, background): “Another approach can be the quantum-enhanced noise radar [137, 253, 254].”