A QKD transmitter emits weak coherent pulses with mean photon number .
PHYSICS · Multi-part · Fermi University Physics · Optics & Photonics · Quantum Information & Technology · Quantum information theory and communication
Quantum Information and Technology, Ch Quantum key distribution and quantum networks
Problem
A QKD transmitter emits weak coherent pulses with mean photon number μ=0.3.
((a)) Find P(0) and P(1), the probabilities that a pulse is empty or carries exactly one photon.
((b)) Find the fraction of non-empty pulses that carry two or more photons.