dorsal/arxiv
View SchemaCooling atomic motion with quantum interference
| Authors | Giovanna Morigi |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0211043 |
| URL | https://arxiv.org/abs/quant-ph/0211043 |
| DOI | 10.1103/PhysRevA.67.033402 |
| Journal | Phys. Rev. A 67, 033502 (2003). |
Abstract
We theoretically investigate the quantum dynamics of the center of mass of trapped atoms, whose internal degrees of freedom are driven in a $\Lambda$-shaped configuration with the lasers tuned at two-photon resonance. In the Lamb-Dicke regime, when the motional wave packet is well localized over the laser wavelenght, transient coherent population trapping occurs, cancelling transitions at the laser frequency. In this limit the motion can be efficiently cooled to the ground state of the trapping potential. We derive an equation for the center-of-mass motion by adiabatically eliminating the internal degrees of freedom. This treatment provides the theoretical background of the scheme presented in [G. Morigi {\it et al}, Phys. Rev. Lett. {\bf 85}, 4458 (2000)] and implemented in [C.F. Roos {\it et al}, Phys. Rev. Lett. {\bf 85}, 5547 (2000)]. We discuss the physical mechanisms determining the dynamics and identify new parameters regimes, where cooling is efficient. We discuss implementations of the scheme to cases where the trapping potential is not harmonic.
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"abstract": "We theoretically investigate the quantum dynamics of the center of mass of\ntrapped atoms, whose internal degrees of freedom are driven in a\n$\\Lambda$-shaped configuration with the lasers tuned at two-photon resonance.\nIn the Lamb-Dicke regime, when the motional wave packet is well localized over\nthe laser wavelenght, transient coherent population trapping occurs, cancelling\ntransitions at the laser frequency. In this limit the motion can be efficiently\ncooled to the ground state of the trapping potential. We derive an equation for\nthe center-of-mass motion by adiabatically eliminating the internal degrees of\nfreedom. This treatment provides the theoretical background of the scheme\npresented in [G. Morigi {\\it et al}, Phys. Rev. Lett. {\\bf 85}, 4458 (2000)]\nand implemented in [C.F. Roos {\\it et al}, Phys. Rev. Lett. {\\bf 85}, 5547\n(2000)]. We discuss the physical mechanisms determining the dynamics and\nidentify new parameters regimes, where cooling is efficient. We discuss\nimplementations of the scheme to cases where the trapping potential is not\nharmonic.",
"arxiv_id": "quant-ph/0211043",
"authors": [
"Giovanna Morigi"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.67.033402",
"journal_ref": "Phys. Rev. A 67, 033502 (2003).",
"title": "Cooling atomic motion with quantum interference",
"url": "https://arxiv.org/abs/quant-ph/0211043"
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