Results 71 to 80 of about 2,808 (218)
Particle Physics and Inflationary Cosmology [PDF]
With the invention of unified theories of strong, weak, electromagnetic and gravitational interactions, elementaryparticle physics has entered a very interesting and unusual stage of its development. The end of the 1960s saw the introduction of the Glashow-Weinberg-Salam unification of the weak and electromagnetic interactions.
openaire +2 more sources
High‐Latitude Zonal Jets in the Martian Upper Atmosphere Driven by Non‐Orographic Gravity Waves
Abstract We investigate thermosphere responses to non‐orographic gravity waves (GWs) using wind measurements from the Neutral Gas and Ion Mass Spectrometer onboard the Mars Atmosphere and Volatile EvolutioN mission, alongside simulations from the Mars Planetary Climate Model. We focus on zonal jets in high‐latitude regions of the upper atmosphere.
Jiandong Liu +4 more
wiley +1 more source
AMPERE Observations of the Asymmetry Toward Stronger Birkeland Currents in the Northern Hemisphere
Abstract We quantify the asymmetry between the Birkeland currents (also known as field‐aligned currents) in the Northern and Southern Hemispheres. We use data from the Active Magnetosphere and Planetary Electrodynamics Response Experiment (AMPERE) in 2010–2024 inclusive for both hemispheres, compute the observed asymmetry, and then subtract the modeled
John C. Coxon +11 more
wiley +1 more source
A Possible Solution to the Mystery of the ANITA Anomalous Events
In 2006 and 2014, the Antarctic Impulsive Transient Antenna (ANITA), a balloon‐borne radio observatory flying over Antarctica, detected two strange upward‐going radio pulse events that have not yet been explained by our current understanding of physics.
Massimo Villata
wiley +1 more source
Combining intervals of ekpyrotic (ultra-slow) contraction with a (non-singular) classical bounce naturally leads to a novel cyclic theory of the universe in which the Hubble parameter, energy density and temperature oscillate periodically, but the scale ...
Anna Ijjas, Paul J. Steinhardt
doaj +1 more source
Looking beyond inflationary cosmology [PDF]
In spite of the phenomenological successes of the inflationary universe scenario, the current realizations of inflation making use of scalar fields lead to serious conceptual problems that are reviewed in this lecture. String theory may provide an avenue towards addressing these problems.
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Abstract String theory has strong implications for cosmology, implying the absence of a cosmological constant, ruling out single‐field slow‐roll inflation, and that black holes decay. The origins of these statements are elucidated within the string‐theoretical swampland programme.
Kay Lehnert
wiley +1 more source
Viable inflationary evolution from Einstein frame loop quantum cosmology [PDF]
In this work we construct a bottom-up reconstruction technique for loop quantum cosmology scalar-tensor theories, from the observational indices. Particularly, the reconstruction technique is based on fixing the functional form of the scalar-to-tensor ...
S. D. Odintsov +5 more
core +1 more source
Inflation after COBE: Lectures on inflationary cosmology [PDF]
In these lectures I review the standard hot big-bang cosmology, emphasizing its successes, its shortcomings, and its major challenge-a detailed understanding of the formation of structure in the Universe.
Turner, M. S.
core +1 more source
Inflationary cosmology in RS-I [PDF]
2 pages, 2 figures, 100 years of relativity international conference on classical and quantum aspects of gravity and ...
openaire +4 more sources

