Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Bulashenko Oleg"'
Gravitational lensing of gravitational waves (GWs) provides a unique opportunity to study cosmology and astrophysics at multiple scales. Detecting microlensing signatures, in particular, requires efficient parameter estimation methods due to the high
Externí odkaz:
http://arxiv.org/abs/2412.00566
Publikováno v:
Phys. Rev. D 108, (2023) 084033
Massive objects located between Earth and a compact binary merger can act as a magnifying glass improving the sensitivity of gravitational wave detectors to distant events. Depending on the parameters of the system, a point mass lens between the dete
Externí odkaz:
http://arxiv.org/abs/2211.13604
Autor:
Bulashenko, Oleg, Ubach, Helena
Publikováno v:
JCAP 07 (2022) 022
When gravitational waves propagate near massive objects, their paths curve resulting in gravitational lensing, which is expected to be a promising new instrument in astrophysics. If the time delay between different paths is comparable with the wave p
Externí odkaz:
http://arxiv.org/abs/2112.10773
Autor:
Galvez Enrique J., Nguyen Thao, Rodriguez-Fajardo Valeria, Kendja Kwakye, Moreso Serra Anna, Bulashenko Oleg
Publikováno v:
EPJ Web of Conferences, Vol 309, p 11002 (2024)
We use spatial light modulation to investigate the diffractive effects of gravitational lensing in the laboratory. Using this new platform for laboratory astrophysics, we can overcome the coherence challenges that prevent the observation of diffracti
Externí odkaz:
https://doaj.org/article/0429287f7c454e18b32310c18cfab562
Publikováno v:
Journal of Optics 20 (2018) 045603
We study the interference and diffraction of light when it propagates through a metamaterial medium mimicking the spacetime of a cosmic string, -- a topological defect with curvature singularity. The phenomenon may look like a gravitational analogue
Externí odkaz:
http://arxiv.org/abs/1711.02420
Publikováno v:
Physics Letters A 381 (2017) 1764-1772
The possibility to detect cosmic strings -- topological defects of early Universe, by means of wave effects in gravitational lensing is discussed. To find the optimal observation conditions, we define the hyperbolic-shaped Fresnel observation zones a
Externí odkaz:
http://arxiv.org/abs/1612.07218
Publikováno v:
Physics Letters A 380 (2016) 2897-2901
We show that if a cosmic string exists, it may be identified through characteristic diffraction pattern in the energy spectrum of the observed signal. In particular, if the string is on the line of sight, the wave field is shown to fit the Cornu spir
Externí odkaz:
http://arxiv.org/abs/1605.03176
Publikováno v:
Physics Letters A 380 (2016) 1-8
Propagation of light in a metamaterial medium which mimics curved spacetime and acts like a black hole is studied. We show that for a particular type of spacetimes and wave polarization, the time dilation appears as dielectric permittivity, while the
Externí odkaz:
http://arxiv.org/abs/1507.08152
Akademický článek
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Publikováno v:
Phys. Rev. Lett. 94, 116803 (2005)
The reduction of quantum scattering leads to the suppression of shot noise. In the present paper, we analyze the crossover from the quantum transport regime with universal shot noise, to the classical regime where noise vanishes. By making use of the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0408075