Constraints on Axionlike Dark Matter with Masses Down to 
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Terrano, W. A.; Adelberger, E. G.; Hagedorn, Charles; Heckel, B. R.

doi:10.1103/physrevlett.122.231301

Cited by 50 publications

(33 citation statements)

References 31 publications

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“…Axions are another class of particle that has garnered interest both in solving the strong CP problem and as a dark matter candidate [10][11][12]. The pseudoscalar coupling of axions to matter dictates searches for odd parity signals such as permanent electric dipole moments of the neutron or electron [13,14], conversion of axions to photons in a strong magnetic field [15,16], nuclear recoils [17], and axions coupling to electron spin-flips [18][19][20][21].…”

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confidence: 99%

Precision Metrology Meets Cosmology: Improved Constraints on Ultralight Dark Matter from Atom-Cavity Frequency Comparisons

et al. 2020

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We conduct frequency comparisons between a state-of-the-art strontium optical lattice clock, a cryogenic crystalline silicon cavity, and a hydrogen maser to set new bounds on the coupling of ultralight dark matter to Standard Model particles and fields in the mass range of 10 −16 − 10 −21 eV. The key advantage of this two-part ratio comparison is the differential sensitivities to time variation of both the fine-structure constant and the electron mass, achieving a substantially improved limit on the moduli of ultralight dark matter, particularly at higher masses than typical atomic spectroscopic results. Furthermore, we demonstrate an extension of the search range to even higher masses by use of dynamical decoupling techniques. These results highlight the importance of using the best performing atomic clocks for fundamental physics applications as all-optical timescales are increasingly integrated with, and will eventually supplant, existing microwave timescales.

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confidence: 99%

Precision Metrology Meets Cosmology: Improved Constraints on Ultralight Dark Matter from Atom-Cavity Frequency Comparisons

et al. 2020

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“…The evidence for dark matter 8 of the current cosmology hints that inertial forces may also result from the effects of dark matter accelerated relative to the laboratory. When all the space of the Universe is permeated with fuzzy dark matter 9,10 , observation of its effects of the inertial forces can be immediate.…”

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confidence: 99%

The observed discordances in cosmology signaling new Physics

Zhang¹

2020

Preprint

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The measured values for the cosmic expansion rate, the cosmic radius, the cosmic age, etc. vary with a direct or an indirect methodology. These discrepancies known as the cosmological crisis imply the existence of a new physical field. The coupling of matter to the ﬁeld causes the ratio between a being measured mass of matter and a reference mass to vary with the field. Any experiment can only measure the relative ratio rather than the absolute mass of matter. Apparently, there are two representations in describing the field dependence of the ratio: the reference (being measured) mass varies with the field while the being measured (reference) mass does not. Therefore, the measured value of every quantity depends on the choice of the representations. A representation is selected based on the conscious or unconscious assumptions in an experiment. This new field can resolve the discrepancies as well as drive the late-time cosmic acceleration. The new closed cosmic model here can remove the tensions in the standard cold dark matter model with Λ being the cosmological constant.

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“…Consequently, the discussed approach would enable measurements with a frequency stability at the nHz level and, therefore, at the levels of f a /C N ∼ 10 9 and f a /C e ∼ 10 8 GeV for axion-nucleon and axion-electron interactions, respectively. This would improve the sensitivity to the axion-electron coupling strength with respect to spin-polarized torsion pendulum experiments [38] by about two orders of magnitude.…”

Section: E Frequency Ratio Measurementmentioning

confidence: 99%

Dual-frequency cesium spin maser

et al. 2020

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Comagnetometers have been validated as valuable components of the atomic physics toolbox in fundamental and applied physics. So far, the explorations have been focused on systems involving nuclear spins. Presented here is a demonstration of an active alkali-metal (electronic) system, i.e., a dual-frequency spin maser operating with the collective cesium F = 3 and F = 4 spins. The experiments have been conducted in both magnetically shielded and unshielded environments. In addition to the discussion of the system's positive-feedback mechanism, the implementation of the dual-frequency spin maser for industrial nondestructive testing is shown. The stability of the F = 3 and F = 4 spin precession frequency ratio measurement is limited at the 3 × 10 −8 level by the laser frequency drift, corresponding to a frequency stability of 1.2 mHz for 10 4 s integration time. We discuss measurement strategies that could improve this stability to nHz, enabling measurements with sensitivities to the axion-nucleon and axion-electron interactions at the levels of f a /C N ∼ 10 9 and f a /C e ∼ 10 8 GeV, respectively.

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Constraints on Axionlike Dark Matter with Masses Down to 10−23 eV/c2

Cited by 50 publications

References 31 publications

Precision Metrology Meets Cosmology: Improved Constraints on Ultralight Dark Matter from Atom-Cavity Frequency Comparisons

Precision Metrology Meets Cosmology: Improved Constraints on Ultralight Dark Matter from Atom-Cavity Frequency Comparisons

The observed discordances in cosmology signaling new Physics

Dual-frequency cesium spin maser

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