Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 12: Quantum Optics II

Q 12.4: Talk

Monday, March 5, 2018, 14:45–15:00, K 0.016

quantum backscatter communication — •Roberto Di Candia — Freie Universitat, Berlin, Germany

Quantum illumination is a revolutionary photonic quantum sensing technology that improves the hypothesis testing performance in noisy and lossy environments. On the other hand, backscatter communication is a long-standing paradigm making use of amplitude and phase modulation together with radar technology to allow data transmission between devices. In this talk, we show how quantum illumination enhances the performance of backscatter communication protocols. We study a narrowband system, in which the symbol duration is long enough that the photodetector receiver is able to receive a sufficiently large number of photons before making any decision. We rigorously derive the signal-to-noise ratio gain in the error probability exponent for the cases of Gaussian and non-Gaussian states as input. We also characterize the quantum radar cross-section of a simple flat dipole antenna and propose a simple model of Rician fading in the quantum setting. These results extend the usefulness of quantum illumination performance beyond the quantum radar, which is supposed to be long-range and, therefore, challenging to build.