# What stochastic process is associated with spontaneous electromagnetic radiation?

Imagine one have an ideal sensor, which can convert the emission to some kinds of signal (typically, voltage, and suppose no noise at all), then what process can describe the measure data? Is it related to Stochastic electrodynamics?

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I also post my question on Physics Forums, where Fermi's golden rule is mentioned. – ziyuang May 25 '11 at 7:49
Just looking at the wikipedia page, I can tell that stochastic electrodynamics (SED) has zilch to do with your question. SED is apparantly an attempt to explain ground state energy without quantum mechanics. It also seems to be a controversial approach. – Raskolnikov Jun 8 '11 at 9:02

The measured data is the Poisson process. That is, if your measurement is over the time interval T, then the probability you will get a measurement of X, which is to say that you will measure X photons, is $P(N(T) = X)$ where $N(T)$ is the Poisson process at time T. – Carl Brannen Jun 9 '11 at 16:44