Einleitung

Frank, Gisela

doi:10.1007/978-3-322-84373-9_1

Cited by 2 publications

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“…Frequency measurement techniques have found considerable attention in precision sensing technology. They have been successfully applied in such fields such as particle detection, bio-sensing, magnetic field and mass sensors, etc [29][30][31] , as well fundamental physics tests 21,[32][33][34] . Unlike the power detection scheme, the fundamental limit in frequency measurements comes from the best achievable frequency stability of the measurement parts and thus it is not directly related to the Nyquist noise and the ambient temperature, although cryogenic cooling may significantly improve the detection limit due to higher quality factors.…”

Section: Frequency Measurement Approachmentioning

confidence: 99%

Axion detection with precision frequency metrology

Goryachev

McAllister

Tobar

2019

Physics of the Dark Universe

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We investigate a new class of galactic halo axion detection techniques based on precision frequency and phase metrology. Employing equations of axion electrodynamics, it is demonstrated how a dual mode cavity exhibits linear mode-mode coupling mediated by the axion upconversion and axion downconversion processes. The approach demonstrates phase sensitivity with an ability to detect axion phase with respect to externally pumped signals. Axion signal to phase spectral density conversion is calculated for open and closed loop detection schemes. The fundamental limits of the proposed approach come from the precision of frequency and environment control electronics, rather than fundamental thermal fluctuations allowing for table-top experiments approaching state-of-the-art cryogenic axion searches in sensitivity. Practical realisations are considered, including a TE-TM mode pair in a cylindrical cavity resonator and two orthogonally polarised modes in a Fabry-Pérot cavity.

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Section: Frequency Measurement Approachmentioning

confidence: 99%

Axion detection with precision frequency metrology

Goryachev

McAllister

Tobar

2019

Physics of the Dark Universe

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“…Such a method of detection measures the lifting of the degeneracy of the system as a frequency shift, a technique commonly used in physics and engineering. Indeed, with the emergence of ultra-high Quality factor cavities in the optical and microwave regions of the photon spectrum, the frequency shift approach has found numerous applications, including biosensing, magnetic field and mass sensing, etc [29][30][31] and has been proposed as a means to detect paraphotons previously 13 . Many well developed a) Electronic mail: michael.tobar@uwa.edu.au frequency measurement techniques have been devised, which allow for high sensitivity of these kinds of measurements when applied to particular sensing problems.…”

Section: Introductionmentioning

confidence: 99%

Probing dark universe with exceptional points

Goryachev

McAllister

Tobar

2019

Physics of the Dark Universe

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It is demonstrated that detection of putative particles such as paraphotons and axions constituting the dark sector of the universe can be reduced to detection of extremely weak links or couplings between cavities and modes. This method allows utilisation of extremely sensitive frequency metrology methods that are not limited by traditional requirements on ultra low temperatures, strong magnetic fields and sophisticated superconducting technology. We show that exceptional points in the eigenmode structure of coupled modes may be used to boost the sensitivity of dark matter mediated weak links. We find observables that are proportional to fractional powers of fundamental coupling constants. Particularly, in the case of axion detection, it is demonstrated that resonance frequency scaling with ∼ g aγγ θ and ∼ 3 g aγγ θ dependencies can be realised in a ternary photonic cavity system, which is beneficial as these coupling constants are extremely small. arXiv:1809.07723v2 [hep-ex]

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Einleitung

Cited by 2 publications

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Axion detection with precision frequency metrology

Axion detection with precision frequency metrology

Probing dark universe with exceptional points

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