Experimental investigation of linear-optics-based quantum target detection
arXiv:1904.06200 · doi:10.1103/PhysRevA.99.053813
Abstract
The development of new techniques to improve measurements is crucial for all sciences. By employing quantum systems as sensors to probe some physical property of interest allows the application of quantum resources, such as coherent superpositions and quantum correlations, to increase measurement precision. Here we experimentally investigate a scheme for quantum target detection based on linear optical measurment devices, when the object is immersed in unpolarized background light. By comparing the quantum (polarization-entangled photon pairs) and the classical (separable polarization states), we found that the quantum strategy provides us an improvement over the classical one in our experiment when the signal to noise ratio is greater than 1/40, or about 16dB of noise. This is in constrast to quantum target detection considering non-linear optical detection schemes, which have shown resilience to extreme amounts of noise. A theoretical model is developed which shows that, in this linear-optics context, the quantum strategy suffers from the contribution of multiple background photons. This effect does not appear in our classical scheme. By improving the two-photon detection electronics, it should be possible to achieve a polarization-based quantum advantage for a signal to noise ratio that is close to 1/400 for current technology.
comments are welcome, submitted to PRA
References in corpus (16)
- Experimental quantum teleportation
- Quantum sensing
- Advances in Photonic Quantum Sensing
- Quantum Illumination with Gaussian States
- Microwave Quantum Illumination
- Quantum Illumination at the Microwave Wavelengths
- Experimental realisation of quantum illumination
- Entanglement-Enhanced Sensing in a Lossy and Noisy Environment
- Real applications of quantum imaging
- Quantum-enhanced standoff detection using correlated photon pairs
- How Discord underlies the Noise Resilience of Quantum Illumination
- Entanglement-enhanced Neyman-Pearson target detection using quantum illumination
- Quantifying the source of enhancement in experimental continuous variable quantum illumination
- Optical Bell-state analysis in the coincidence basis
- Overarching framework between Gaussian quantum discord and Gaussian quantum illumination
- How much entanglement can be generated between two atoms by detecting photons?
Cited by in corpus (9)
- Multidimensional quantum-enhanced target detection via spectro-temporal correlation measurements
- Optimal probes for continuous variable quantum illumination
- Quantum illumination via quantum-enhanced sensing
- Experimental Quantum Target Detection Approaching the Fundamental Helstrom Limit
- Quantum illumination receiver using double homodyne detection
- Observable bound for Gaussian illumination
- Robust interferometric sensing using two-photon interference
- Bound for Gaussian-state Quantum illumination using direct photon measurement
- Experimental demonstration of phase estimation advantage in presence of depolarizing noise by using coherent measurements