Challenges and opportunities of gravitational-wave searches at MHz to GHz frequencies

Aggarwal, N.; Clesse, S.; Tobar, Michael E.; Goryachev, Maxim; Steinlechner, J.; Ünal, Caner; Quevedo, Fernando; Muia, Francesco; Domcke, Valerie; Bauswein, Andreas; Steinlechner, S.; Sun, S.; Peloso, Marco; White, Graham; Mukund, N.; Torrentí, Francisco; Ottaway, D. J.; Geraci, Andrew; Figueroa, Daniel G.; Ricciardone, Angelo; Cella, G.; Grote, H.; Cruise, A. M.; Aguiar, O. D.; Hindmarsh, Mark

doi:10.1007/s41114-021-00032-5

Cited by 213 publications

(134 citation statements)

References 332 publications

(329 reference statements)

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“…as in Eq. (1). From this, we can identify an effective charge ρ eff = −∇•P and an effective 3-current j eff = ∇×M+∂ t P.…”

Section: A the Effective Magnetization-polarization Tensormentioning

confidence: 99%

“…For a more detailed discussion of sources in the MHz band, we refer to Ref. [1]. There are no known sizable astrophysical sources in this frequency range, implying that any GW detection at UHF is a smoking gun signal of new physics.…”

Section: Gravitational Wave Sources In the Ultra-high Frequency Bandmentioning

confidence: 99%

“…A subset of existing proposals in this frequency range are shown in grey, taken from Refs. [1,2]. Additional specifics are provided in the text.…”

mentioning

confidence: 99%

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A novel search for high-frequency gravitational waves with low-mass axion haloscopes

Domcke,

Garcia-Cely,

Rodd

2022

Preprint

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Gravitational waves (GWs) generate oscillating electromagnetic effects in the vicinity of external electric and magnetic fields. We discuss this phenomenon with a particular focus on reinterpreting the results of axion haloscopes based on lumped-element detectors, which probe GWs in the 100 kHz -100 MHz range. Measurements from ABRACADABRA and SHAFT already place bounds on GWs, although the present strain sensitivity is weak. However, we demonstrate that the sensitivity scaling with the volume of such instruments is significant -faster than for axions -and so rapid progress will be made in the future. With no modifications, DMRadio-m 3 will have a GW strain sensitivity of h ∼ 10 −20 at 200 MHz. A simple modification of the pickup loop used to readout the induced magnetic flux can parametrically enhance the GW sensitivity, particularly at lower frequencies.

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“…as in Eq. (1). From this, we can identify an effective charge ρ eff = −∇•P and an effective 3-current j eff = ∇×M+∂ t P.…”

Section: A the Effective Magnetization-polarization Tensormentioning

confidence: 99%

Section: Gravitational Wave Sources In the Ultra-high Frequency Bandmentioning

confidence: 99%

See 1 more Smart Citation

A novel search for high-frequency gravitational waves with low-mass axion haloscopes

Domcke,

Garcia-Cely,

Rodd

2022

Preprint

Self Cite

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“…In this section, we very briefly highlight a few that are of particular interest, some of which are shown in Figure 7. Our focus here is on the nanohertz-kilohertz frequency band; however, see the review article [304] and references therein for a summary of detection methods at MHz frequencies and above.…”

Section: Other Stochastic Background Searchesmentioning

confidence: 99%

Stochastic Gravitational-Wave Backgrounds: Current Detection Efforts and Future Prospects

Renzini¹,

Goncharov²,

Jenkins³

et al. 2022

Preprint

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The collection of individually resolvable gravitational wave (GW) events makes up a tiny fraction of all GW signals that reach our detectors, while most lie below the confusion limit and are undetected. Similarly to voices in a crowded room, the collection of unresolved signals gives rise to a background that is well-described via stochastic variables and, hence, referred to as the stochastic GW background (SGWB). In this review, we provide an overview of stochastic GW signals and characterise them based on features of interest such as generation processes and observational properties. We then review the current detection strategies for stochastic backgrounds, offering a ready-to-use manual for stochastic GW searches in real data. In the process, we distinguish between interferometric measurements of GWs, either by ground-based or space-based laser interferometers, and timing-residuals analyses with pulsar timing arrays (PTAs). These detection methods have been applied to real data both by large GW collaborations and smaller research groups, and the most recent and instructive results are reported here. We close this review with an outlook on future observations with third generation detectors, space-based interferometers, and potential noninterferometric detection methods proposed in the literature.

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“…Going beyond our current capabilities for detection, the high-frequency region f 30 kHz has recently attracted a lot of interest (see, for example, [3]). Gravitational waves at those frequencies are radiated by several different sources active both in the early and the late Universe (see [4] for a review).…”

Section: Introductionmentioning

confidence: 99%

Thermal Emission of Gravitational Waves from Weak to Strong Coupling

Castells-Tiestos¹,

Casalderrey-Solana²

2022

Preprint

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We study the production of gravitational waves by a thermalized plasma of N =4 Supersymmetric Yang Mills matter. We focus on the large number of colors limit, N c → ∞, and compute the spectrum of gravitational waves both for infinitely large and infinitesimally small values of the t'Hoft coupling constant λ. In the λ → ∞ limit we employ the gauge/gravity duality to compute the emission rate via the analysis of Energy-Momentum tensor thermal correlators. In the λ → 0 limit we employ state-of-the-art perturbative analyses to calculate the complete leading order emission rate. By comparing these extreme limits, we bracket the magnitude of the spectrum induced by this source of gravitational waves. Embedding our results in a cosmological evolution model, we find qualitative and quantitative similarities between the strong coupling spectrum and the extrapolation of the perturbative results up to an intermediate value of the coupling, after an appropriate re-scaling of the effective number of degrees of freedom. We comment on how our results can help better understand the contribution of thermalized matter to the stochastic spectrum of gravitational waves.

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Challenges and opportunities of gravitational-wave searches at MHz to GHz frequencies

Cited by 213 publications

References 332 publications

A novel search for high-frequency gravitational waves with low-mass axion haloscopes

A novel search for high-frequency gravitational waves with low-mass axion haloscopes

Stochastic Gravitational-Wave Backgrounds: Current Detection Efforts and Future Prospects

Thermal Emission of Gravitational Waves from Weak to Strong Coupling

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