High-Precision Spectroscopy of the HD+ Molecule at the 1-p.p.b. Level

Biesheuvel, J.; Karr, Jean‐Philippe; Hilico, Laurent; Eikema, K.S.E.; Ubachs, Wim; Koelemeij, J.C.J.

doi:10.1007/978-3-319-64346-5_16

Cited by 2 publications

(4 citation statements)

References 42 publications

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“…Impressive progress on both the experimental [30][31][32][33][34][35][36][37] and the theoretical [38][39][40][41][42][43][44][45][46][47][48][49] sides of precision molecular spectroscopy have been accomplished in the past decade, opening the possibility of searching for extra forces below the Å scale using transition frequencies of well-understood simple molecular systems. Certain of these results have recently been used to bound short distance modifications of gravity, see Refs.…”

Section: B Molecular Spectroscopymentioning

confidence: 99%

Bounding quantum dark forces

2018

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Dark sectors lying beyond the Standard Model and containing sub-GeV particles which are bilinearly coupled to nucleons would induce quantum forces of the Casimir-Polder type in ordinary matter. Such new forces can be tested by a variety of experiments over many orders of magnitude. We provide a generic interpretation of these experimental searches and apply it to a sample of forces from dark scalars behaving as 1=r 3 , 1=r 5 , 1=r 7 at short range. The landscape of constraints on such quantum forces differs from the one of modified gravity with Yukawa interactions and features, in particular, strong short-distance bounds from molecular spectroscopy and neutron scattering.

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Section: B Molecular Spectroscopymentioning

confidence: 99%

Bounding quantum dark forces

2018

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“…However, the relationship between the fluorescence change and the number of excited dark ions is in general non-linear and is influenced by various experimental parameters, such as the strength of the motional excitation and the geometry of the mixed ion crystal. Therefore, evaluating the number of dark ions quantitatively is challenging and often requires intricate modeling and calibration of the signal using molecular dynamics simulations [26,39]. This problem has been limiting the usage of the secular excitation method for highly precise spectroscopy so far.…”

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confidence: 99%

“…Spectroscopy of dark ions requires a scheme for detecting that the target transition is being excited. This can for example be achieved by monitoring that new ion species are created by state-dependent photoionization [40] or resonance-enhanced multiphoton dissociation [18][19][20]39]. The reliable detection of single dark ions demonstrates that this detection scheme can be singleevent sensitive and that the spectroscopy will be ultimately limited only by quantum projection noise.…”

mentioning

confidence: 99%

“…The reliable detection of single dark ions demonstrates that this detection scheme can be singleevent sensitive and that the spectroscopy will be ultimately limited only by quantum projection noise. Nonlinearities in the signal intensity may introduce a systematic frequency shift, especially when the spectrum consists of multiple overlapping lines [39]. Accurate counting of the dark ions gives rise to a spectroscopy signal with negligible nonlinearity.…”

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confidence: 99%

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Number-resolved detection of dark ions in Coulomb crystals

et al. 2022

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While it is straightforward to count laser-cooled trapped ions by fluorescence imaging, detecting the number of dark ions embedded and sympathetically cooled in a mixed ion crystal is more challenging. We demonstrate a method to track the number of dark ions in real time with singleparticle sensitivity. This is achieved by observing discrete steps in the amount of fluorescence emitted from the coolant ions while exciting secular motional resonances of dark ions. By counting the number of fluorescence steps, we can identify the number of dark ions without calibration and without relying on any physical model of the motional excitation. We demonstrate the scheme by detecting H + 2 and H + 3 ions embedded in a Be + ion Coulomb crystal in a linear radio frequency trap. Our method allows observing the generation and destruction of individual ions simultaneously for different types of ions. Besides high-resolution spectroscopy of dark ions, another application is the detection of chemical reactions in real time with single-particle sensitivity. This is demonstrated in this work.

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High-Precision Spectroscopy of the HD+ Molecule at the 1-p.p.b. Level

Cited by 2 publications

References 42 publications

Bounding quantum dark forces

Bounding quantum dark forces

Number-resolved detection of dark ions in Coulomb crystals

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