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Figure 7 | EPJ Quantum Technology

Figure 7

From: Measuring the stability of fundamental constants with a network of clocks

Figure 7

Parameter spaces for a model of an oscillating scalar dark-matter field interacting with (a) the electromagnetic field and (b) the electron via the quadratic-in-ϕ interactions in Eq. (17). The estimated sensitivities of clocks within the QSNET network to apparent oscillations of the fundamental constants are shown by the green lines. Also shown are existing limits from previous searches for oscillations of the fundamental constants via clock comparisons (blue region) [12, 130], as well as complementary types of bounds from searches for equivalence-principle-violating forces (grey regions) [14] and measurements and calculations pertaining to big bang nucleosynthesis (red regions) [12]. See the main text for more details

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