Next Generation Design and Prospects for Cannex

Sedmik, René I. P.; Pitschmann, Mario

doi:10.3390/universe7070234

Cited by 16 publications

(27 citation statements)

References 247 publications

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“…In future work we plan to use SELCIE with a genetic algorithm to find experimental configurations which optimise the possibility of detecting a chameleon fifth force. This optimisation algorithm could be used, for example, to extend the reach of current and future experiments that search for chameleon fifth forces with atom interferometry [33,34,41,55,56], ultra-cold neutrons [57][58][59][60][61][62], torsion balances [63][64][65], Casimir experiments [66][67][68][69][70] or opto-mechanical sensors [71][72][73][74].…”

Section: Discussionmentioning

confidence: 99%

SELCIE: a tool for investigating the chameleon field of arbitrary sources

Briddon

Burrage

Moss

et al. 2021

J. Cosmol. Astropart. Phys.

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The chameleon model is a modified gravity theory that introduces an additional scalar field that couples to matter through a conformal coupling. This `chameleon field' possesses a screening mechanism through a nonlinear self-interaction term which allows the field to affect cosmological observables in diffuse environments whilst still being consistent with current local experimental constraints. Due to the self-interaction term the equations of motion of the field are nonlinear and therefore difficult to solve analytically. The analytic solutions that do exist in the literature are either approximate solutions and or only apply to highly symmetric systems. In this work we introduce the software package SELCIE (https://github.com/C-Briddon/SELCIE.git). This package equips the user with tools to construct an arbitrary system of mass distributions and then to calculate the corresponding solution to the chameleon field equation. It accomplishes this by using the finite element method and either the Picard or Newton nonlinear solving methods. We compared the results produced by SELCIE with analytic results from the literature including discrete and continuous density distributions. We found strong (sub-percentage) agreement between the solutions calculated by SELCIE and the analytic solutions.

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Section: Discussionmentioning

confidence: 99%

SELCIE: a tool for investigating the chameleon field of arbitrary sources

Briddon

Burrage

Moss

et al. 2021

J. Cosmol. Astropart. Phys.

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show abstract

“…A few prospective experiments for constraining the parameters of axionlike particles and non-Newtonian gravity are suggested in the literature but have not yet been performed. Here, one should mention an experiment measuring the Casimir pressure between parallel plates at up to 25-30 µm separations (Cannex) [117][118][119][120]. An approach for searching for dark matter axions with m a < 1 µeV using a superconducting radio frequency cavity was proposed in [121].…”

Section: Discussionmentioning

confidence: 99%

Dark Matter Axions, Non-Newtonian Gravity and Constraints on Them from Recent Measurements of the Casimir Force in the Micrometer Separation Range

Mostepanenko

2021

Universe

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We consider axionlike particles as the most probable constituents of dark matter, the Yukawa-type corrections to Newton’s gravitational law and constraints on their parameters following from astrophysics and different laboratory experiments. After a brief discussion of the results by Prof. Yu. N. Gnedin in this field, we turn our attention to the recent experiment on measuring the differential Casimir force between Au-coated surfaces of a sphere and the top and bottom of rectangular trenches. In this experiment, the Casimir force was measured over an unusually wide separation region from 0.2 to 8μm and compared with the exact theory based on first principles of quantum electrodynamics at nonzero temperature. We use the measure of agreement between experiment and theory to obtain the constraints on the coupling constant of axionlike particles to nucleons and on the interaction strength of a Yukawa-type interaction. The constraints obtained on the axion-to-nucleon coupling constant and on the strength of a Yukawa interaction are stronger by factors of 4 and 24, respectively, than those found previously from gravitational experiments and measurements of the Casimir force but weaker than the constraints following from a differential measurement where the Casimir force was nullified. Some other already performed and planned experiments aimed at searching for axions and non-Newtonian gravity are discussed, and their prospects are evaluated.

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“…Here, we consider limits that can be obtained by the Casimir And Non-Newtonian force EXperiment (Cannex) [13] (see also [37][38][39]). This experiment consists of two parallel plates in a vacuum chamber and has been devised to measure the Casimir force and hypothetical fifth forces.…”

Section: Dilaton-induced Pressure In Casimir Experimentsmentioning

confidence: 99%

The environment dependent dilaton in the laboratory and the solar system

et al. 2022

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We consider the environment-dependent dilaton in the laboratory and the solar system and derive approximate analytical solutions to the field theory equations of motion in the presence of a one or two mirror system or a sphere. The solutions obtained herein can be applied to qBOUNCE experiments, neutron interferometry and for the calculation of the dilaton field induced “Casimir force” in the Cannex experiment as well as for Lunar Laser Ranging. They are typical of the Damour–Polyakov screening mechanism whereby deviations from General Relativity are suppressed by a vanishingly small direct coupling of the dilaton to matter in dense environments. We specifically focus on dilaton models which are compatible with the late time acceleration of the expansion of the Universe, i.e. the cosmological dilaton. We show how future laboratory experiments will essentially test a region of parameter space with $$A_2\simeq \lambda ^2$$ A 2 ≃ λ 2 where $$A_2$$ A 2 is the quadratic coupling strength of the dilaton to matter and $$\lambda $$ λ is the steepness of the exponential runaway potential. Current constraints favour the large $$A_2$$ A 2 regime implying that the environment-dependent dilaton satisfies two of the swampland conjectures, i.e. the distance conjecture whereby the field excursion should not exceed the Planck scale and the de Sitter conjecture specifying that the running dilaton potential should be steep enough with a large $$\lambda $$ λ .

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Next Generation Design and Prospects for Cannex

Cited by 16 publications

References 247 publications

SELCIE: a tool for investigating the chameleon field of arbitrary sources

SELCIE: a tool for investigating the chameleon field of arbitrary sources

Dark Matter Axions, Non-Newtonian Gravity and Constraints on Them from Recent Measurements of the Casimir Force in the Micrometer Separation Range

The environment dependent dilaton in the laboratory and the solar system

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