@MPN

• Mean photon number of laser with only signal state. If @LASER_NUM is larger then one, list them separated by ",". If there's decoy and vacuum state, see @DECOY_PARAMS
• Mean photon number: Determine by the poisson distribution formula.

probability of having n photon with MPN:

P(n)=(MPN^n * e^-MPN)/n!

• Is store as MPN in the fortran code.

example

@MPN
0.1

Which mean the system has one laser, and it mean photon number is 0.1.