Optical Transitions in Highly Charged Californium Ions with High Sensitivity to Variation of the Fine-Structure Constant

Berengut, J. C.; Dzuba, V. A.; Flambaum, V. V.; Ong, Alex

doi:10.1103/physrevlett.109.070802

Cited by 59 publications

(31 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This enables spectroscopy of previously intractable ion species, such as group 13 (see Sec. V.D), highly charged (Berengut, Dzuba, and Flambaum, 2010;Berengut et al, 2011Berengut et al, , 2012Derevianko, Dzuba, and Flambaum, 2012;Flambaum, 2012a, 2012b), and molecular ions Vogelius, Madsen, and Drewsen, 2006;Koelemeij, Roth, and Schiller, 2007;Ding and Matsukevich, 2012;Leibfried, 2012).…”

Section: Quantum Logic Spectroscopymentioning

confidence: 99%

Optical atomic clocks

et al. 2015

View full text Add to dashboard Cite

Optical atomic clocks represent the state of the art in the frontier of modern measurement science. In this article a detailed review on the development of optical atomic clocks that are based on trapped single ions and many neutral atoms is provided. Important technical ingredients for optical clocks are discussed and measurement precision and systematic uncertainty associated with some of the best clocks to date are presented. An outlook on the exciting prospect for clock applications is given in conclusion.

show abstract

Section: Quantum Logic Spectroscopymentioning

confidence: 99%

Optical atomic clocks

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Note that none of the atomic systems considered here have particularly high sensitivities (large q values), so no non-linear effects are expected, and indeed none are observed. Much larger sensitivities can be found, e.g., in highly charged ions with large nuclear charges [56,57]. In general, δx must be taken small enough so that the linear requirement of (A3) is valid, but must also be large enough for the variation δω to avoid numerical errors.…”

Section: Lowermentioning

confidence: 99%

Search for a Variation of the Fine Structure Constant around the Supermassive Black Hole in Our Galactic Center

Hees

Roberts

et al. 2020

Phys. Rev. Lett.

View full text Add to dashboard Cite

Searching for space-time variations of the constants of Nature is a promising way to search for new physics beyond General Relativity and the standard model motivated by unification theories and models of dark matter and dark energy. We propose a new way to search for a variation of the fine-structure constant using measurements of late-type evolved giant stars from the S-star cluster orbiting the supermassive black hole in our Galactic Center. A measurement of the difference between distinct absorption lines (with different sensitivity to the fine structure constant) from a star leads to a direct estimate of a variation of the fine structure constant between the star's location and Earth. Using spectroscopic measurements of 5 stars, we obtain a constraint on the relative variation of the fine structure constant below 10 −5 . This is the first time a varying constant of Nature is searched for around a black hole and in a high gravitational potential. This analysis shows new ways the monitoring of stars in the Galactic Center can be used to probe fundamental physics.

show abstract

“…This level crossing is available in isoelectronic sequences with 81 ≤ Z ≤ 101. It was originally exploited in [37] where it was shown that optical transitions in Cf 16+ (N = 82 with two valence electrons) have the largest sensitivity to variation of the fine-structure constant seen in any atomic system. We discuss more examples in Sec.…”

Section: Ground State Level Crossingsmentioning

confidence: 99%

Highly charged ions withE1,M1, andE2 transitions within laser range

et al. 2012

Self Cite

View full text Add to dashboard Cite

Level crossings in the ground state of ions occur when the nuclear charge Z and ion charge Zion are varied along an isoelectronic sequence until the two outermost shells are nearly degenerate. We examine all available level crossings in the periodic table for both near neutral ions and highly charged ions (HCIs). Normal E1 transitions in HCIs are in X-ray range, however level crossings allow for optical electromagnetic transitions that could form the reference transition for high accuracy atomic clocks. Optical E1 (due to configuration mixing), M1 and E2 transitions are available in HCIs near level crossings. We present scaling laws for energies and amplitudes that allow us to make simple estimates of systematic effects of relevance to atomic clocks. HCI clocks could have some advantages over existing optical clocks because certain systematic effects are reduced, for example they can have much smaller thermal shifts. Other effects such as fine-structure and hyperfine splitting are much larger in HCIs, which can allow for richer spectra. HCIs are excellent candidates for probing variations in the fine-structure constant, α, in atomic systems as there are transitions with the highest sensitivity to α-variation.

show abstract

Optical Transitions in Highly Charged Californium Ions with High Sensitivity to Variation of the Fine-Structure Constant

Cited by 59 publications

References 26 publications

Optical atomic clocks

Optical atomic clocks

Search for a Variation of the Fine Structure Constant around the Supermassive Black Hole in Our Galactic Center

Highly charged ions withE1,M1, andE2 transitions within laser range

Contact Info

Product

Resources

About