Electromagnetic detector for gravitational waves

Пегораро, Ф.; Radicati, L. A.; Bernard, P.; Picasso, E.

doi:10.1016/0375-9601(78)90792-2

Cited by 68 publications

(68 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They are GEO [306] (Hannover, Germany), TAMA [305] (Tokyo, Japan), VIRGO [307] (Cascina, Italy), and the two LIGO [308] Microwave cavities have been originally proposed as GW detectors in the GHz-MHz region of the spectrum [309]. A first prototype has been built in MIT in 1978 showing that this idea could be actually implemented in order to detct small harmonic displacements [310].…”

Section: Detectors Of Relic Gravitonsmentioning

confidence: 99%

Theoretical Tools for CMB Physics

Giovannini

2005

Int. J. Mod. Phys. D

105

View full text Add to dashboard Cite

This review presents, in a self-consistent manner, those analytical tools that are relevant for the analysis of the physics of CMB anisotropies generated in different theoretical models of the early Universe. After introducing the physical foundations of the Sachs-Wolfe effect, the origin and evolution of the scalar, tensor and vector modes of the geometry is treated in both gauge-invariant and gauge-dependent descriptions. Some of the recent progresses in the theory of cosmological perturbations are scrutinized with particular attention to their implications for the adiabatic and isocurvature paradigms, whose description is reviewed both within conventional fluid approaches and within the the Einstein-Boltzmann treatment. Open problems and theoretical challenges for a unified theory of the early Universe are outlined in light of their implications for the generation of large-scale anisotropies in the CMB sky and in light of the generation of stochastic backgrounds of relic gravitons between few Hz and the GHz.

show abstract

Section: Detectors Of Relic Gravitonsmentioning

confidence: 99%

Theoretical Tools for CMB Physics

Giovannini

2005

Int. J. Mod. Phys. D

105

View full text Add to dashboard Cite

show abstract

“…For example, the frequency spectrum of a resonator depends on its dimensions and hence knowledge of the precise values of these dimensions is of utmost importance. Cases in which the effects of gravitational fields and acceleration must be considered include those in which the gravitational field is to be measured, such as in proposals for the measurement of gravitational waves with electromagnetic cavity resonators [1][2][3][4][5][6][7] or other extended matter systems [8][9][10][11][12][13][14], tests of GR [15,16] or the expansion of the universe [17,18]. Other situations are those in which the metrological system is significantly accelerated [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Frequency spectrum of an optical resonator in a curved spacetime

et al. 2018

View full text Add to dashboard Cite

The effect of gravity and proper acceleration on the frequency spectrum of an optical resonator-both rigid or deformable-is considered in the framework of general relativity. The optical resonator is modeled either as a rod of matter connecting two mirrors or as a dielectric rod whose ends function as mirrors. Explicit expressions for the frequency spectrum are derived for the case that it is only perturbed slightly and variations are slow enough to avoid any elastic resonances of the rod. For a deformable resonator, the perturbation of the frequency spectrum depends on the speed of sound in the rod supporting the mirrors. A connection is found to a relativistic concept of rigidity when the speed of sound approaches the speed of light. In contrast, the corresponding result for the assumption of Born rigidity is recovered when the speed of sound becomes infinite. The results presented in this article can be used as the basis for the description of optical and opto-mechanical systems in a curved spacetime. We apply our results to the examples of a uniformly accelerating resonator and an optical resonator in the gravitational field of a small moving sphere. To exemplify the applicability of our approach beyond the framework of linearized gravity, we consider the fictitious situation of an optical resonator falling into a black hole.

show abstract

“…In this range of frequencies microwave cavities or even wave guides [38,39,40] can be used as detectors of gravitational waves.…”

Section: Prospects For Wide-band Detectorsmentioning

confidence: 99%

The refractive index of relic gravitons

Giovannini¹

2016

Class. Quantum Grav.

View full text Add to dashboard Cite

The dynamical evolution of the refractive index of the tensor modes of the geometry produces a specific class of power spectra characterized by a blue (i.e. slightly increasing) slope which is directly determined by the competition of the slow-roll parameter and of the rate of variation of the refractive index. Throughout the conventional stages of the inflationary and post-inflationary evolution, the microwave background anisotropies measurements, the pulsar timing limits and the big-bang nucleosythesis constraints set stringent bounds on the refractive index and on its rate of variation. Within the physically allowed region of the parameter space the cosmic background of relic gravitons leads to a potentially large signal for the ground based detectors (in their advanced version) and for the proposed space-borne interferometers. Conversely, the lack of direct detection of the signal will set a qualitatively new bound on the dynamical variation of the refractive index.

show abstract

Electromagnetic detector for gravitational waves

Cited by 68 publications

References 0 publications

Theoretical Tools for CMB Physics

Theoretical Tools for CMB Physics

Frequency spectrum of an optical resonator in a curved spacetime

The refractive index of relic gravitons

Contact Info

Product

Resources

About