Matches in SemOpenAlex for { <https://semopenalex.org/work/W4384647958> ?p ?o ?g. }
Showing items 1 to 59 of
59
with 100 items per page.
- W4384647958 abstract "We study the perturbations up to the 2nd-order for a power-law inflation driven by a scalar field in synchronous coordinates. We solve the 1st-order perturbed Einstein equation and scalar field equation, give the 1st-order solutions for all the scalar, vector, and tensor metric perturbations, as well as the perturbed scalar field. During inflation, the 1st-order tensor perturbation is a wave and is decoupled from other perturbations, the scalar metric perturbation and the perturbed scalar field are coupled waves, propagating at the speed of light, differing from those in the dust and relativistic fluid models. The 1st-order vector perturbation is not wave and just decreases during inflation. The 2nd-order perturbed Einstein equation is similar in structure to the 1st-order one, but various products of the 1st-order perturbations occur as the effective source, among which the scalar-scalar coupling is considered in this paper. The solutions of all the 2nd-order perturbations consist of a homogeneous part similar to the 1st-order solutions, and an inhomogeneous part in a form of integrations of the effective source. The 2nd-order vector perturbation is also a wave since the effective source is composed of the 1st-order waves. We perform the residual gauge transformations between synchronous coordinates up to the 2nd-order, and identify the 1st-order and 2nd-order gauge modes." @default.
- W4384647958 created "2023-07-19" @default.
- W4384647958 creator A5022802322 @default.
- W4384647958 creator A5056887317 @default.
- W4384647958 date "2023-07-17" @default.
- W4384647958 modified "2023-09-23" @default.
- W4384647958 title "Second-order cosmological perturbations produced by scalar-scalar coupling during inflation stage" @default.
- W4384647958 doi "https://doi.org/10.48550/arxiv.2307.08261" @default.
- W4384647958 hasPublicationYear "2023" @default.
- W4384647958 type Work @default.
- W4384647958 citedByCount "0" @default.
- W4384647958 crossrefType "posted-content" @default.
- W4384647958 hasAuthorship W4384647958A5022802322 @default.
- W4384647958 hasAuthorship W4384647958A5056887317 @default.
- W4384647958 hasBestOaLocation W43846479581 @default.
- W4384647958 hasConcept C110521144 @default.
- W4384647958 hasConcept C117210361 @default.
- W4384647958 hasConcept C121332964 @default.
- W4384647958 hasConcept C147452769 @default.
- W4384647958 hasConcept C177918212 @default.
- W4384647958 hasConcept C2524010 @default.
- W4384647958 hasConcept C2778632639 @default.
- W4384647958 hasConcept C27877202 @default.
- W4384647958 hasConcept C3079626 @default.
- W4384647958 hasConcept C33923547 @default.
- W4384647958 hasConcept C37914503 @default.
- W4384647958 hasConcept C57691317 @default.
- W4384647958 hasConcept C62520636 @default.
- W4384647958 hasConcept C74650414 @default.
- W4384647958 hasConceptScore W4384647958C110521144 @default.
- W4384647958 hasConceptScore W4384647958C117210361 @default.
- W4384647958 hasConceptScore W4384647958C121332964 @default.
- W4384647958 hasConceptScore W4384647958C147452769 @default.
- W4384647958 hasConceptScore W4384647958C177918212 @default.
- W4384647958 hasConceptScore W4384647958C2524010 @default.
- W4384647958 hasConceptScore W4384647958C2778632639 @default.
- W4384647958 hasConceptScore W4384647958C27877202 @default.
- W4384647958 hasConceptScore W4384647958C3079626 @default.
- W4384647958 hasConceptScore W4384647958C33923547 @default.
- W4384647958 hasConceptScore W4384647958C37914503 @default.
- W4384647958 hasConceptScore W4384647958C57691317 @default.
- W4384647958 hasConceptScore W4384647958C62520636 @default.
- W4384647958 hasConceptScore W4384647958C74650414 @default.
- W4384647958 hasLocation W43846479581 @default.
- W4384647958 hasOpenAccess W4384647958 @default.
- W4384647958 hasPrimaryLocation W43846479581 @default.
- W4384647958 hasRelatedWork W1642333974 @default.
- W4384647958 hasRelatedWork W1968990256 @default.
- W4384647958 hasRelatedWork W1982974112 @default.
- W4384647958 hasRelatedWork W1998088071 @default.
- W4384647958 hasRelatedWork W2019067433 @default.
- W4384647958 hasRelatedWork W2026168617 @default.
- W4384647958 hasRelatedWork W2214105377 @default.
- W4384647958 hasRelatedWork W2990900303 @default.
- W4384647958 hasRelatedWork W3100457544 @default.
- W4384647958 hasRelatedWork W3101512612 @default.
- W4384647958 isParatext "false" @default.
- W4384647958 isRetracted "false" @default.
- W4384647958 workType "article" @default.