Bispectrum-based hybrid neural network for motor imagery classification
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Neuroscience Methods"
DOI: 10.1016/j.jneumeth.2022.109593
Abstract: BACKGROUND The performance of motor imagery electroencephalogram (MI-EEG) decoding systems is easily affected by noise. As a higher-order spectra (HOS), the bispectrum is capable of suppressing Gaussian noise and increasing the signal-to-noise ratio of signals.… read more here.
Keywords: bispectrum; neural network; motor imagery; bispectrum based ... See more keywords
Searching for bispectrum of stochastic gravitational waves with pulsar timing arrays
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/03/032
Abstract: We study how to probe bispectra of stochastic gravitational waves with pulsar timing arrays. The bispectrum is a key to probe the origin of stochastic gravitational waves. In particular, the shape of the bispectrum carries… read more here.
Keywords: gravitational waves; stochastic gravitational; timing arrays; waves pulsar ... See more keywords
Constraining neutrino mass with the tomographic weak lensing bispectrum
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/05/043
Abstract: We explore the effect of massive neutrinos on the weak lensing shear bispectrum using the Cosmological Massive Neutrino Simulations. We find that the primary effect of massive neutrinos is to suppress the amplitude of the… read more here.
Keywords: weak lensing; bispectrum; neutrino mass; power spectrum ... See more keywords
Speeding up the detectability of the harmonic-space galaxy bispectrum
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/01/002
Abstract: We present a method that allows us for the first time to estimate the signal-to-noise ratio (SNR) of the harmonic-space galaxy bispectrum induced by gravity, a complementary probe to already well established Fourier-space clustering analyses.… read more here.
Keywords: space galaxy; galaxy; space; harmonic space ... See more keywords
Statistically-anisotropic tensor bispectrum from inflation
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/03/047
Abstract: We develop a possibility of generating tensor non-Gaussianity in a kind of anisotropic inflation, where a (1) gauge field is kinetically coupled to a spectator scalar field. Owing to this coupling, the coherent mode of… read more here.
Keywords: field; tensor; statistically anisotropic; bispectrum ... See more keywords
Local primordial non-Gaussianity in the relativistic galaxy bispectrum
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/04/013
Abstract: Next-generation galaxy and 21cm intensity mapping surveys will rely on a combination of the power spectrum and bispectrum for high-precision measurements of primordial non-Gaussianity. In turn, these measurements will allow us to distinguish between various… read more here.
Keywords: galaxy; non gaussianity; order; primordial non ... See more keywords
Constraining M ν with the bispectrum. Part II. The information content of the galaxy bispectrum monopole
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/04/029
Abstract: Massive neutrinos suppress the growth of structure on small scales and leave an imprint on large-scale structure that can be measured to constrain their total mass, M ν. With standard analyses of two-point clustering statistics,… read more here.
Keywords: galaxy bispectrum; bispectrum; information content; bispectrum monopole ... See more keywords
A fast estimator for quantifying the shape dependence of the 3D bispectrum
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/12/024
Abstract: The dependence of the bispectrum on the size and shape of the triangle contains a wealth of cosmological information. Here we consider a triangle parameterization which allows us to separate the size and shape dependence.… read more here.
Keywords: shape; dependence bispectrum; shape dependence; bispectrum ... See more keywords
Continuous spectrum on cosmological collider
Sign Up to like & getrecommendations! Published in 2023 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2023/04/002
Abstract: We study the effects of a massive field with a continuous spectrum (continuum isocurvaton) on the inflationary bispectrum in the squeezed limit. As a concrete example, we extend the quasi-single field inflation model to include… read more here.
Keywords: bispectrum; continuum isocurvaton; spectrum cosmological; continuous spectrum ... See more keywords
Free cosmic density bispectrum on small scales
Sign Up to like & getrecommendations! Published in 2025 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2025/09/083
Abstract: We study the asymptotic behaviour of the free, cold-dark matter density fluctuation bispectrum in the limit of small scales. From an initially Gaussian random field, we draw phase-space positions of test particles which then propagate… read more here.
Keywords: bispectrum small; bispectrum; zel dovich; density ... See more keywords
The 21-cm bispectrum as a probe of non-Gaussianities due to X-ray heating
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty2740
Abstract: We present analysis of the normalized 21-cm bispectrum from fully-numerical simulations of intergalactic-medium heating by stellar sources and high-mass X-ray binaries (HMXBs) during the cosmic dawn. Ly-α coupling is assumed to be saturated, we therefore probe… read more here.
Keywords: bispectrum; ray heating; normalized bispectrum; non gaussianities ... See more keywords