Results 91 to 100 of about 32,545 (270)
Constraining dark photons and their connection to 21 cm cosmology with CMB data
Physics Letters B, 2020 In the inhomogeneous Universe, the cosmological conversion of dark photons into ordinary photons (and vice versa) may happen at a great number of resonance redshifts. This alters the CMB observed energy spectrum and degree of small-scale anisotropies. We
Kyrylo Bondarenko +2 more
doaj +1 more source
Anisotropy of the gravitational-wave standard sirens and its cosmological applications
European Physical Journal C: Particles and Fields, 2022 We analyze the anisotropic factors present in the gravitational wave signal, such as the peculiar velocity of the observer and the inhomogeneous distribution of matter in the universe.
Lin Chen +4 more
doaj +1 more source
General Aspects of the de Sitter phase
, 2004 We present a detailed discussion of the inflationary scenario in the context of inhomogeneous cosmologies. After a review of the fundamental features characterizing the inflationary model, as referred to a homogeneous and isotropic Universe, we develop a
Imponente, Giovanni, Montani, Giovanni
core +2 more sources
Growth of Millimeter‐Sized BaTaO2N Single Crystals by an NH3‐Assisted BaCl2 Flux Method
Advanced Functional Materials, EarlyView.Millimeter‐sized BaTaO2N single crystals are successfully grown from a BaCl2 flux under NH3 flow. Their comprehensive characterization, including dielectric properties, is demonstrated, and the possible growth mechanisms are discussed. Abstract Perovskite‐type oxynitrides have attracted considerable attention due to their excellent photocatalytic ...
Ginji Harada +2 more
wiley +1 more source
A Closed, Expanding Universe in String Theory
, 1992 We present a conformal field theory -- obtained from a gauged WZW model -- that describes a closed, inhomogeneous expanding and recollapsing universe in $3+1$ dimensions.
Altschuler +12 more
core +1 more source
Reionization of an Inhomogeneous Universe
, 2001 Full radiative transfer in 3D space has been solved to pursue the reionization history in an inhomogeneous universe. It has been shown that the reionization of an inhomogeneous universe is not a prompt event, but a fairly slow process. Also, QSO absorption line systems are simulated with using the results of radiative transfer calculations.
Umemura, M., Nakamoto, T., Susa, H.
openaire +2 more sources
Advanced Functional Materials, EarlyView.An innovative combination of size‐controlled template synthesis, partial cation exchange reactions, and dual shell passivation offers a new class of RoHS‐compliant, heavy metal‐free Cu‐Zn‐In‐Se/ZnS/Al2O3 core/shell/shell quantum dots (QDs), exhibiting long‐range tunability, highly efficient SWIR emission with remarkably narrow photoluminescence ...
Avijit Saha +8 more
wiley +1 more source
Volume Expansion of Swiss-Cheese Universe
, 2002 In order to investigate the effect of inhomogeneities on the volume expansion of the universe, we study modified Swiss-Cheese universe model. Since this model is an exact solution of Einstein equations, we can get an insight into non-linear dynamics of ...
B. P. Schmidt +20 more
core +1 more source
Microsphere Autolithography—A Scalable Approach for Arbitrary Patterning of Dielectric Spheres
Advanced Functional Materials, EarlyView.MicroSphere Autolithography (µSAL) enables scalable fabrication of patchy particles with customizable surface motifs. Focusing light through dielectric microspheres creates well defined, tunable patches via a conformal poly(dopamine) photoresist. Nearly arbitrary surface patterns can be achieved, with the resolution set by the index contrast between ...
Elliott D. Kunkel +3 more
wiley +1 more source
COSMOARCHEOLOGY: ASTROPHYSICAL PROBES FOR NEW PHYSICS IN THE EARLY UNIVERSE
Odessa Astronomical Publications, 2017 The original Gamov's Big Bang cosmology has evolved for the last decades to the modern cosmology, losing the direct relationship with the experimentally proven physical laws. It is the aim of cosmoparticle physics to study both the early Universe and the
M. Yu. Khlopov
doaj +1 more source