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European Quantum Electronics Conference (EQEC)

Atomic Interferometry with the Micromaser

Oliver J. Benson, M. Weidinger, Georg A. Raithel, HERBERT WALTHER

Published Jan 1, 1996• 2 citations
Publisher
DOI
10.1109/eqec.1996.561929

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In this paper we report on atomic interferometry in the micromaser. The experimentally observed interferences are due to the non-adiabatic mixing of dressed states of the atoms at the entrance and exit holes of the maser cavity, leading to Ramsey-type two-field interaction. The observations are explained on the basis of the micromaser theory. Statistical properties of the maser field are investigated via a measurement of the statistics of the pump atoms that leave the maser cavity. Theoretical expressions for the time dependence of the Fano-Mandel-parameter QA(t) are compared with the experimental data. We demonstrate, that metastability of the maser field and atomic interference strongly influence the approach to a steady state value of QA(t). Furthermore, a theoretical investigation of a maser pumped with ultra-cold atoms is discussed. The interplay between reflection and transmission events of the atoms leads to a photon emission probability that strongly depends on the quantized center-of-mass motion (z-motion) of the atoms. We demonstrate that this mazer operation can be completely different from the ordinary maser pumped by a beam of thermal atoms.

Fortschritte der Physik•Nov 1, 1998•3 citations
Atomic interferences are observed in the micromaser when the inversion of the atoms leaving the cavity is measured while the cavity frequency is scanned across the atomic resonance. The interferences are due to the nonadiabatic mixing of dressed states at the entrance and exit holes of the maser cavity. The interference structures are triangular shaped and approximately equidistant. They are associated with the dynamics of the atom-field interaction, show quantum jumps, and demonstrate bistability of the micromaser field.
In this paper we report on atomic interferometry in the micromaser. The atomic inversion is recorded while scanning the cavity frequency across the atomic resonance. For high pump rates, interference patterns are observed on the low-frequency wing of the maser line. The interferences are due to the non-adiabatic mixing of dressed states of the atoms at the entrance and exit holes of the maser cavity, leading to a Ramsey-type two-field interaction. Furthermore, statistical properties of the maser field are investigated via a measurement of the statistics of the pump atoms that leave the maser cavity. Theoretical expressions for the time dependence of the Fano–Mandel parameter Q A(t) are compared with the experimental data. We demonstrate, that metastability of the maser field and atomic interference strongly influence the approach to a steady-state value of Q A(t).
In this paper we report on atomic interferometry in the micromaser. The experimentally observed interferences are due to the non-adiabatic mixing of dressed states of the atoms at the entrance and exit holes of the maser cavity, leading to Ramsey-type two-field interaction. The observations are explained on the basis of the micromaser theory. Statistical properties of the maser field are investigated via a measurement of the statistics of the pump atoms that leave the maser cavity. Theoretical expressions for the time dependence of the Fano-Mandel-parameter QA(t) are compared with the experimental data. We demonstrate, that metastability of the maser field and atomic interference strongly influence the approach to a steady state value of QA(t). Furthermore, a theoretical investigation of a maser pumped with ultra-cold atoms is discussed. The interplay between reflection and transmission events of the atoms leads to a photon emission probability that strongly depends on the quantized center-of-mass motion (z-motion) of the atoms. We demonstrate that this mazer operation can be completely different from the ordinary maser pumped by a beam of thermal atoms.