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Frequency-comb spectroscopy on pure quantum states of a single molecular ion.

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Title: Frequency-comb spectroscopy on pure quantum states of a single molecular ion.
Authors: Chou, C. W., Collopy, A. L., Kurz, C., Lin, Y., Harding, M. E., Plessow, P. N., Fortier, T., Diddams, S., Leibfried, D., Leibrandt, D. R.
Source: Science (pre-March 2025). 3/27/2020, Vol. 367 Issue 6485, p1458-1461. 4p. 2 Diagrams, 2 Charts, 1 Graph.
Subjects: Spectrometry, Ions, Quantum states, Chemistry, Astrophysics
Abstract: Spectroscopy is a powerful tool for studying molecules and is commonly performed on large thermal molecular ensembles that are perturbed by motional shifts and interactions with the environment and one another, resulting in convoluted spectra and limited resolution. Here, we use quantum-logic techniques to prepare a trapped molecular ion in a single quantum state, drive terahertz rotational transitions with an optical frequency comb, and read out the final state nondestructively, leaving the molecule ready for further manipulation. We can resolve rotational transitions to 11 significant digits and derive the rotational constant of 40CaH+ to be BR = 142 501 777.9(1.7) kilohertz. Our approach is suited for a wide range of molecular ions, including polyatomics and species relevant for tests of fundamental physics, chemistry, and astrophysics. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Frequency-comb spectroscopy on pure quantum states of a single molecular ion.
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  Data: <searchLink fieldCode="AR" term="%22Chou%2C+C%2E+W%2E%22">Chou, C. W.</searchLink><br /><searchLink fieldCode="AR" term="%22Collopy%2C+A%2E+L%2E%22">Collopy, A. L.</searchLink><br /><searchLink fieldCode="AR" term="%22Kurz%2C+C%2E%22">Kurz, C.</searchLink><br /><searchLink fieldCode="AR" term="%22Lin%2C+Y%2E%22">Lin, Y.</searchLink><br /><searchLink fieldCode="AR" term="%22Harding%2C+M%2E+E%2E%22">Harding, M. E.</searchLink><br /><searchLink fieldCode="AR" term="%22Plessow%2C+P%2E+N%2E%22">Plessow, P. N.</searchLink><br /><searchLink fieldCode="AR" term="%22Fortier%2C+T%2E%22">Fortier, T.</searchLink><br /><searchLink fieldCode="AR" term="%22Diddams%2C+S%2E%22">Diddams, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Leibfried%2C+D%2E%22">Leibfried, D.</searchLink><br /><searchLink fieldCode="AR" term="%22Leibrandt%2C+D%2E+R%2E%22">Leibrandt, D. R.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 3/27/2020, Vol. 367 Issue 6485, p1458-1461. 4p. 2 Diagrams, 2 Charts, 1 Graph.
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  Data: <searchLink fieldCode="DE" term="%22Spectrometry%22">Spectrometry</searchLink><br /><searchLink fieldCode="DE" term="%22Ions%22">Ions</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+states%22">Quantum states</searchLink><br /><searchLink fieldCode="DE" term="%22Chemistry%22">Chemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Astrophysics%22">Astrophysics</searchLink>
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  Data: Spectroscopy is a powerful tool for studying molecules and is commonly performed on large thermal molecular ensembles that are perturbed by motional shifts and interactions with the environment and one another, resulting in convoluted spectra and limited resolution. Here, we use quantum-logic techniques to prepare a trapped molecular ion in a single quantum state, drive terahertz rotational transitions with an optical frequency comb, and read out the final state nondestructively, leaving the molecule ready for further manipulation. We can resolve rotational transitions to 11 significant digits and derive the rotational constant of 40CaH+ to be BR = 142 501 777.9(1.7) kilohertz. Our approach is suited for a wide range of molecular ions, including polyatomics and species relevant for tests of fundamental physics, chemistry, and astrophysics. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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              Text: 3/27/2020
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