@ETERNITY (EntangleLASER)
- When @ETERNITY (EntangleLASER) is .TRUE. photon won't die on the system. If @EntangleLASER_NUM is larger then one, list them separated by ",".
- Is store as eternity in the fortran code.
example
@ETERNITY .false.
Which mean the system has one Entanglelaser, and the simulated photons will die along the light path.