2. Channels of transmission |
Information channels of information. Codification formats. Wave propagation in homogeneous dielectric media. Gaussian beams. Optical fibres. Propagation modes. Dispersion in optical fibres. Attenuation in optical fibres. |
3. Production snd detection of single photons |
Photon source characteristics and characterization methods. Overview of single photon sources: parametric down conversion, four wave mixing, quantum dots. Weak coherent pulses vs single photons. Single photon detectors: photomultiplier tubes, semiconductor-based detectors, superconductor-based detectors. Optical coherent detection . |
4. Main experimental platforms of QKD. |
Discrete variable QKD: polarization, phase and time encoding. Continuos variable QKD: Gaussian modulation, quadrature-amplitude modulation. Fiber based QKD vs Free space QKD. Measurement device independent QKD and Twin field QKD. Device-Independent QKD. |