dorsal/arxiv
View SchemaRaman cooling and heating of two trapped Ba+ ions
| Authors | D. Reiss, K. Abich, W. Neuhauser, Ch. Wunderlich, P. E. Toschek |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0104002 |
| URL | https://arxiv.org/abs/quant-ph/0104002 |
| DOI | 10.1103/PhysRevA.65.053401 |
| Journal | Phys. Rev. A 65 (2002) 053401 |
Abstract
We study cooling of the collective vibrational motion of two 138Ba+ ions confined in an electrodynamic trap and irradiated with laser light close to the resonances S_1/2-P_1/2 (493 nm) and P_1/2-D_3/2 (650 nm). The motional state of the ions is monitored by a spatially resolving photo multiplier. Depending on detuning and intensity of the cooling lasers, macroscopically different motional states corresponding to different ion temperatures are observed. We also derive the ions' temperature from detailed analytical calculations of laser cooling taking into account the Zeeman structure of the energy levels involved. The observed motional states perfectly match the calculated temperatures. Significant heating is observed in the vicinity of the dark resonances of the Zeeman-split S_1/2-D_3/2 Raman transitions. Here two-photon processes dominate the interaction between lasers and ions. Parameter regimes of laser light are identified that imply most efficient laser cooling.
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"abstract": "We study cooling of the collective vibrational motion of two 138Ba+ ions\nconfined in an electrodynamic trap and irradiated with laser light close to the\nresonances S_1/2-P_1/2 (493 nm) and P_1/2-D_3/2 (650 nm). The motional state of\nthe ions is monitored by a spatially resolving photo multiplier. Depending on\ndetuning and intensity of the cooling lasers, macroscopically different\nmotional states corresponding to different ion temperatures are observed. We\nalso derive the ions\u0027 temperature from detailed analytical calculations of\nlaser cooling taking into account the Zeeman structure of the energy levels\ninvolved. The observed motional states perfectly match the calculated\ntemperatures. Significant heating is observed in the vicinity of the dark\nresonances of the Zeeman-split S_1/2-D_3/2 Raman transitions. Here two-photon\nprocesses dominate the interaction between lasers and ions. Parameter regimes\nof laser light are identified that imply most efficient laser cooling.",
"arxiv_id": "quant-ph/0104002",
"authors": [
"D. Reiss",
"K. Abich",
"W. Neuhauser",
"Ch. Wunderlich",
"P. E. Toschek"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.65.053401",
"journal_ref": "Phys. Rev. A 65 (2002) 053401",
"title": "Raman cooling and heating of two trapped Ba+ ions",
"url": "https://arxiv.org/abs/quant-ph/0104002"
},
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