Axion-photon coupling imprints measurable Aharonov-Bohm and Berry phases in superconducting circuits and interferometers, projecting sensitivity to g_aγγ ~ 7.8e-14 GeV^{-1} at m_a ~ 1e-10 eV.
Dynamical axion field in topological magnetic insulators
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abstract
Axions are very light, very weakly interacting particles postulated more than 30 years ago in the context of the Standard Model of particle physics. Their existence could explain the missing dark matter of the universe. However, despite intensive searches, they have yet to be detected. In this work, we show that magnetic fluctuations of topological insulators couple to the electromagnetic fields exactly like the axions, and propose several experiments to detect this dynamical axion field. In particular, we show that the axion coupling enables a nonlinear modulation of the electromagnetic field, leading to attenuated total reflection. We propose a novel optical modulators device based on this principle.
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Effective EM coupling of the axionic quasi-particle mode in magnetic TIs is unchanged or suppressed by up to 100x relative to previous estimates.
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Searching for axions with quantum interferometry
Axion-photon coupling imprints measurable Aharonov-Bohm and Berry phases in superconducting circuits and interferometers, projecting sensitivity to g_aγγ ~ 7.8e-14 GeV^{-1} at m_a ~ 1e-10 eV.
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Collective excitations in magnetic topological insulators and axion dark matter search
Effective EM coupling of the axionic quasi-particle mode in magnetic TIs is unchanged or suppressed by up to 100x relative to previous estimates.