dorsal/arxiv
View SchemaTheory of a single-atom laser including light forces
| Authors | Thomas Salzburger, Peter Domokos, Helmut Ritsch |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0504094 |
| URL | https://arxiv.org/abs/quant-ph/0504094 |
| DOI | 10.1103/PhysRevA.72.033805 |
Abstract
We study a single incoherently pumped atom moving within an optical high-Q resonator in the strong coupling regime. Using a semiclassical description for the atom and field dynamics, we derive a closed system of differential equations to describe this coupled atom-field dynamics. For sufficiently strong pumping the system starts lasing when the atom gets close to a field antinode, and the associated light forces provide for self-trapping of the atom. For a cavity mode blue detuned with respect to the atomic transition frequency this is combined with cavity induced motional cooling allowing for long term steady-state operation of such a laser. The analytical results for temperature and field statistics agree well with our earlier predictions based on Quantum Monte Carlo simulations. We find sub-Doppler temperatures that decrease with gain and coupling strength and can even go beyond the limit of passive cavity cooling. Besides demonstrating the importance of light forces in single-atom lasers, this result also gives strong evidence to enhance laser cooling through stimulated emission in resonators.
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"abstract": "We study a single incoherently pumped atom moving within an optical high-Q\nresonator in the strong coupling regime. Using a semiclassical description for\nthe atom and field dynamics, we derive a closed system of differential\nequations to describe this coupled atom-field dynamics. For sufficiently strong\npumping the system starts lasing when the atom gets close to a field antinode,\nand the associated light forces provide for self-trapping of the atom. For a\ncavity mode blue detuned with respect to the atomic transition frequency this\nis combined with cavity induced motional cooling allowing for long term\nsteady-state operation of such a laser. The analytical results for temperature\nand field statistics agree well with our earlier predictions based on Quantum\nMonte Carlo simulations. We find sub-Doppler temperatures that decrease with\ngain and coupling strength and can even go beyond the limit of passive cavity\ncooling. Besides demonstrating the importance of light forces in single-atom\nlasers, this result also gives strong evidence to enhance laser cooling through\nstimulated emission in resonators.",
"arxiv_id": "quant-ph/0504094",
"authors": [
"Thomas Salzburger",
"Peter Domokos",
"Helmut Ritsch"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.72.033805",
"title": "Theory of a single-atom laser including light forces",
"url": "https://arxiv.org/abs/quant-ph/0504094"
},
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