Atomic beam correlations and the quantum state of the micromaser
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Correlation measurements on the states of two-level atoms having passed through a micromaser at different times can be used to infer properties of the quantum state of the radiation field in the cavity. Long(short) correlation length in time is to some extent associated with super(sub)-Poissonian photon statistics. The correlation length is also an indicator of a phase structure much richer than what is revealed by the usual single-time observables, like the atomic inversion or the Mandel quality factor. In realistic experimental situations the correlations may extend over many times the decay time of the cavity. Our assertions are verified by comparing theoretical calculations with a high-precision Monte-Carlo simulation of the micromaser system.
4 pages, styles: aps, latex, times, epsf, More physical insight added, title and figures changed, more references. The paper can be retrieved as compressed file called elmfors.maser.ps.Z from http://connect.nbi.dk/pub/lautrup/ or via anonymous ftp at ftp://connect.nbi.dk/pub/lautrup/
4 pages, styles: aps, latex, times, epsf, More physical insight added, title and figures changed, more references. The paper can be retrieved as compressed file called elmfors.maser.ps.Z from http://connect.nbi.dk/pub/lautrup/ or via anonymous ftp at ftp://connect.nbi.dk/pub/lautrup/