String axiverse
WebApr 29, 2010 · “Axiverse” is the word we invented for a theory with many extremely light particles (axions). It’s meant to remind about one of the most interesting and … WebJul 8, 2014 · Abstract. In the axiverse scenario, a massive scalar field (string axion) forms a cloud around a rotating black hole (BH) by superradiant instability and emits continuous gravitational waves (GWs ...
String axiverse
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WebSep 29, 2024 · We study the properties of these axiverse cosmic strings including the vital effects of moduli stabilization, and find that the string cores provide `portals' to different … WebTest your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.
WebJun 1, 2024 · String scenarios generically predict that we live in a so called axiverse: the Universe with about a hundred of light axion species which are decoupled from the Standard Model particles. However, the axions can couple to the inflaton which leads to their production after inflation. WebIt has recently been suggested that the presence of a plenitude of light axions, an Axiverse, is evidence for the extra dimensions of string theory. We discuss the observational …
Web–2– Most of the attempts to realise quintessence within string theory rely on axions and shift symmetries [5–8]. In this paper we shall, however, take a different approach, and build the first string model where the quintessence field is a scalar parameterising the size of an internal four-cycle. WebWe find that string axions in various mass ranges generate gravitational waves (GWs) with peaks at various frequencies determined by the mass scales, dubbed the GW forest. This …
WebString theory suggests the simultaneous presence of many ultralight axions, possibly populating each decade of mass down to the Hubble scale 10 -33eV. Conversely the presence of such a plenitude of axions (an axiverse) would be evidence for string theory, since it arises due to the topological complexity of the extra-dimensional manifold and is …
WebJan 10, 2024 · String theory compactifications may generate many light axion-like particles (ALPs) with weak couplings to electromagnetism. In general, a large number of ALPs may exist, with a linear combination having a potentially observable coupling to electromagnetism. nick jr pbs kids playhouse tier listWebSep 9, 2014 · Journal Article: Dark Energy from the String Axiverse Dark Energy from the String Axiverse. Full Record; Other Related Research nick jr paddington bearWebremarks. The rest of the paper is devoted to analyzing axions in various string models. The main conclusion is as it has been in the past: there is some tension between string models of axions and cosmological bounds, with the axion coupling parameter in many string models being larger, and hence the axion frequency smaller, than allowed by the novofem wirkstoffWeb// Documentation Portal . Resources Developer Site; Xilinx Wiki; Xilinx Github; Support Support Community nick jr online free games for kidsWebString theory suggests the simultaneous presence of many ultralight axions, possibly populating each decade of mass down to the Hubble scale 10 -33 eV. Conversely the presence of such a plenitude of axions (an axiverse) would be evidence for string theory, since it arises due to the topological complexity of the extra-dimensional manifold and is … novofer folicoWebString theory may give rise to a “string axiverse” [8, 9], a family of O(100) axion-like fields with masses that span a huge number of decades. In each decade of the cosmic expansion, one of these axions becomes dynamical and has some small chance to drive an accelerated expan-sion. These chances are determined by the initial value, novoferm 1300WebOct 22, 2012 · We study the phenomenological features of the LVS axiverse, deriving the masses of the axions and their couplings to matter and gauge fields. We also determine … novoferm 1180