Quantum illumination uses quantum correlations to provide an enhanced detection of an object in the presence of background noise. This advantage has been shown to exist even if one uses nonoptimal direct measurements on the two correlated modes. Here we present a protocol that mimics the behavior of quantum illumination, but does not use correlated or entangled modes. Instead, the protocol uses coherent (or phase-randomized coherent) pulses with randomly chosen intensities. The intensities are drawn from a distribution such that the average state looks thermal. Under appropriate conditions, the mimic protocol can perform similarly to quantum illumination schemes that use direct measurements. This holds even for a reflectance as low as 10−7. We also present an analytic condition which allows one to determine the sets of parameters in which each protocol works best.
Using random coherent states to mimic quantum illumination
Samantaray, Nigam;
2023-01-01
Abstract
Quantum illumination uses quantum correlations to provide an enhanced detection of an object in the presence of background noise. This advantage has been shown to exist even if one uses nonoptimal direct measurements on the two correlated modes. Here we present a protocol that mimics the behavior of quantum illumination, but does not use correlated or entangled modes. Instead, the protocol uses coherent (or phase-randomized coherent) pulses with randomly chosen intensities. The intensities are drawn from a distribution such that the average state looks thermal. Under appropriate conditions, the mimic protocol can perform similarly to quantum illumination schemes that use direct measurements. This holds even for a reflectance as low as 10−7. We also present an analytic condition which allows one to determine the sets of parameters in which each protocol works best.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
