# Enhanced Sensitivity of Photodetection via Quantum Illumination

@article{Lloyd2008EnhancedSO, title={Enhanced Sensitivity of Photodetection via Quantum Illumination}, author={Seth Lloyd}, journal={Science}, year={2008}, volume={321}, pages={1463 - 1465} }

The use of quantum-mechanically entangled light to illuminate objects can provide substantial enhancements over unentangled light for detecting and imaging those objects in the presence of high levels of noise and loss. Each signal sent out is entangled with an ancilla, which is retained. Detection takes place via an entangling measurement on the returning signal together with the ancilla. This paper shows that for photodetection, quantum illumination with m bits of entanglement can in…

## 547 Citations

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A quantum illumination protocol exploits correlated light beams to enhance the probability of detection of a partially reflecting object lying in a very noisy background. Recently a simple…

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The continuous-variable Gaussian quantum information formalism is used to show that quantum illumination is better for object detection compared with coherent states of the same mean photon number, even for simple direct photodetection.

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In quantum illumination, the signal mode of light, entangled with an idler mode, is dispatched towards a suspected object bathed in thermal noise, and the returning mode, along with the stored idler…

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The minimum resolvable signal in sensing and metrology platforms that rely on optical readout fields is increasingly constrained by the standard quantum limit, which is determined by the sum of…

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A quantum illumination protocol especially adapted to quantum microwave technology is proposed, which seizes the phase-shift induced by some cloaking techniques, allowing for a 3 dB improvement in the detection of a cloaked target.

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