dorsal/arxiv
View SchemaExperiments towards quantum information with trapped Calcium ions
| Authors | D. Leibfried, C. Roos, P. Barton, H. Rohde, S. Gulde, A. B. Mundt, G. Reymond, M. Lederbauer, F. Schmidt-Kaler, J. Eschner, R. Blatt |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0009105 |
| URL | https://arxiv.org/abs/quant-ph/0009105 |
| DOI | 10.1063/1.1354345 |
Abstract
Ground state cooling and coherent manipulation of ions in an rf-(Paul) trap is the prerequisite for quantum information experiments with trapped ions. With resolved sideband cooling on the optical S1/2 - D5/2 quadrupole transition we have cooled one and two 40Ca+ ions to the ground state of vibration with up to 99.9% probability. With a novel cooling scheme utilizing electromagnetically induced transparency on the S1/2 - P1/2 manifold we have achieved simultaneous ground state cooling of two motional sidebands 1.7 MHz apart. Starting from the motional ground state we have demonstrated coherent quantum state manipulation on the S1/2 - D5/2 quadrupole transition at 729 nm. Up to 30 Rabi oscillations within 1.4 ms have been observed in the motional ground state and in the n=1 Fock state. In the linear quadrupole rf-trap with 700 kHz trap frequency along the symmetry axis (2 MHz in radial direction) the minimum ion spacing is more than 5 micron for up to 4 ions. We are able to cool two ions to the ground state in the trap and individually address the ions with laser pulses through a special optical addressing channel.
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"date_modified": "2026-03-02T18:01:39.108000Z",
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"abstract": "Ground state cooling and coherent manipulation of ions in an rf-(Paul) trap\nis the prerequisite for quantum information experiments with trapped ions. With\nresolved sideband cooling on the optical S1/2 - D5/2 quadrupole transition we\nhave cooled one and two 40Ca+ ions to the ground state of vibration with up to\n99.9% probability. With a novel cooling scheme utilizing electromagnetically\ninduced transparency on the S1/2 - P1/2 manifold we have achieved simultaneous\nground state cooling of two motional sidebands 1.7 MHz apart. Starting from the\nmotional ground state we have demonstrated coherent quantum state manipulation\non the S1/2 - D5/2 quadrupole transition at 729 nm. Up to 30 Rabi oscillations\nwithin 1.4 ms have been observed in the motional ground state and in the n=1\nFock state. In the linear quadrupole rf-trap with 700 kHz trap frequency along\nthe symmetry axis (2 MHz in radial direction) the minimum ion spacing is more\nthan 5 micron for up to 4 ions. We are able to cool two ions to the ground\nstate in the trap and individually address the ions with laser pulses through a\nspecial optical addressing channel.",
"arxiv_id": "quant-ph/0009105",
"authors": [
"D. Leibfried",
"C. Roos",
"P. Barton",
"H. Rohde",
"S. Gulde",
"A. B. Mundt",
"G. Reymond",
"M. Lederbauer",
"F. Schmidt-Kaler",
"J. Eschner",
"R. Blatt"
],
"categories": [
"quant-ph"
],
"doi": "10.1063/1.1354345",
"title": "Experiments towards quantum information with trapped Calcium ions",
"url": "https://arxiv.org/abs/quant-ph/0009105"
},
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