Control of Resonant Interaction between Electronic Ground and Excited States
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Abstract
We observe magnetic Feshbach resonances in a collision between the ground and metastable states of two-electron atoms of ytterbium (Yb). We measure the on-site interaction of doubly occupied sites of an atomic Mott-insulator state in a three-dimensional optical lattice as a collisional frequency shift in a high-resolution laser spectroscopy. The observed spectra are well fitted by a simple theoretical formula, in which two particles with an s-wave contact interaction are confined in a harmonic trap. This analysis reveals a wide variation of the interaction with a resonance behavior around a magnetic field of about 1.1 G for the energetically lowest magnetic sublevel of [170]Yb, as well as around 360 mG for the energetically highest magnetic sublevel of [174]Yb. The observed Feshbach resonance can only be induced by an anisotropic interatomic interaction. This scheme will open the door to a variety of studies using two-electron atoms with tunable interaction.
Journal
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- Physical Review Letters
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Physical Review Letters 110 (17), 2013-04
American Physical Society (APS)
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Details 詳細情報について
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- CRID
- 1050001335769779840
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- NII Article ID
- 120005244914
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- NII Book ID
- AA00773679
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- ISSN
- 00319007
- 10797114
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- HANDLE
- 2433/174060
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- Text Lang
- en
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- Article Type
- journal article
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- Data Source
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- IRDB
- CiNii Articles