dorsal/arxiv
View SchemaGround state cooling, quantum state engineering and study of decoherence of ions in Paul traps
| Authors | F. Schmidt-Kaler, Ch. Roos, H. C. Naegerl, H. Rohde, S. Gulde, A. Mundt, M. Lederbauer, G. Thalhammer, Th. Zeiger, P. Barton, L. Hornekaer, G. Reymond, D. Leibfried, J. Eschner, R. Blatt |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0003096 |
| URL | https://arxiv.org/abs/quant-ph/0003096 |
| DOI | 10.1080/09500340008232182 |
Abstract
We investigate single ions of $^{40}Ca^+$ in Paul traps for quantum information processing. Superpositions of the S$_{1/2}$ electronic ground state and the metastable D$_{5/2}$ state are used to implement a qubit. Laser light on the S$_{1/2} \leftrightarrow$ D$_{5/2}$ transition is used for the manipulation of the ion's quantum state. We apply sideband cooling to the ion and reach the ground state of vibration with up to 99.9% probability. Starting from this Fock state $|n=0>$, we demonstrate coherent quantum state manipulation. A large number of Rabi oscillations and a ms-coherence time is observed. Motional heating is measured to be as low as one vibrational quantum in 190 ms. We also report on ground state cooling of two ions.
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"date_created": "2026-03-02T18:01:38.682000Z",
"date_modified": "2026-03-02T18:01:38.682000Z",
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"abstract": "We investigate single ions of $^{40}Ca^+$ in Paul traps for quantum\ninformation processing. Superpositions of the S$_{1/2}$ electronic ground state\nand the metastable D$_{5/2}$ state are used to implement a qubit. Laser light\non the S$_{1/2} \\leftrightarrow$ D$_{5/2}$ transition is used for the\nmanipulation of the ion\u0027s quantum state. We apply sideband cooling to the ion\nand reach the ground state of vibration with up to 99.9% probability. Starting\nfrom this Fock state $|n=0\u003e$, we demonstrate coherent quantum state\nmanipulation. A large number of Rabi oscillations and a ms-coherence time is\nobserved. Motional heating is measured to be as low as one vibrational quantum\nin 190 ms. We also report on ground state cooling of two ions.",
"arxiv_id": "quant-ph/0003096",
"authors": [
"F. Schmidt-Kaler",
"Ch. Roos",
"H. C. Naegerl",
"H. Rohde",
"S. Gulde",
"A. Mundt",
"M. Lederbauer",
"G. Thalhammer",
"Th. Zeiger",
"P. Barton",
"L. Hornekaer",
"G. Reymond",
"D. Leibfried",
"J. Eschner",
"R. Blatt"
],
"categories": [
"quant-ph"
],
"doi": "10.1080/09500340008232182",
"title": "Ground state cooling, quantum state engineering and study of decoherence of ions in Paul traps",
"url": "https://arxiv.org/abs/quant-ph/0003096"
},
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"source": {
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"variant": "snapshot-2026-03-01",
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