A weak laser pulse used to seed a satellite quantum link is prepared in a coherent…

PHYSICS · Subjective · 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 weak laser pulse used to seed a satellite quantum link is prepared in a coherent state ∣α⟩|\alpha\rangle with mean photon number μ=∣α∣2=1.2\mu = |\alpha|^2 = 1.2. Using the Poisson photon-number distribution of a coherent state, P(n)=e−μμn/n!P(n) = e^{-\mu}\mu^n/n!, find P(0)P(0), P(1)P(1) and P(2)P(2).

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