Zobrazeno 1 - 10
of 81
pro vyhledávání: '"Battefeld, Thorsten"'
Autor:
Wang, Gaoyuan, Battefeld, Thorsten
Publikováno v:
JCAP 09 (2016) 008
We develope a computationally efficient extension of the Dyson Brownian Motion (DBM) algorithm to generate random function in C2 locally. We further explain that random functions generated via DBM show an unstable growth as the traversed distance inc
Externí odkaz:
http://arxiv.org/abs/1607.02514
Autor:
Wang, Gaoyuan, Battefeld, Thorsten
Publikováno v:
JCAP 04 (2016) 025
We compute the distribution of minima that are reached dynamically on multi-field axionic landscapes, both numerically and analytically. Such landscapes are well suited for inflationary model building due to the presence of shift symmetries and possi
Externí odkaz:
http://arxiv.org/abs/1512.04224
Publikováno v:
MNRAS (October 11, 2015) 453 (1): 797-809
We propose an anisotropic generalisation of the line correlation function (ALCF) to separate and quantify phase information in the large-scale structure of galaxies. The line correlation function probes the strictly non-linear regime of structure for
Externí odkaz:
http://arxiv.org/abs/1504.04036
Autor:
Battefeld, Thorsten, Modi, Chirag
Publikováno v:
JCAP 03 (2015) 010
We generate random functions locally via a novel generalization of Dyson Brownian motion, such that the functions are in a desired differentiability class, while ensuring that the Hessian is a member of the Gaussian orthogonal ensemble (other ensembl
Externí odkaz:
http://arxiv.org/abs/1409.5135
Autor:
Battefeld, Thorsten, Freitas, R. C.
Publikováno v:
JCAP 09 (2014) 029
We discuss a universal bound on any excitation of heavy fields during inflation: the ratio of the heavy field's energy density to the one driving inflation must be less than the maximally allowed relative amplitude of oscillations in the power-spectr
Externí odkaz:
http://arxiv.org/abs/1405.7969
Publikováno v:
Phys. Rev. D 89, 123523 (2014)
We consider trapped inflation in a higher dimensional field space: particle production at a dense distribution of extra species points leads to a terminal velocity at which inflation can be driven in steep potentials. We compute an additional, nearly
Externí odkaz:
http://arxiv.org/abs/1309.4082
Autor:
Battefeld, Diana, Battefeld, Thorsten
Publikováno v:
JCAP 07 (2013) 038
We consider inflation driven near a saddle point in a higher dimensional field space, which is the most likely type of slow roll inflation on the string theoretical landscape; anthropic arguments need to be invoked in order to find a sufficiently fla
Externí odkaz:
http://arxiv.org/abs/1304.0461
Publikováno v:
JCAP 05 (2013) 006
We derive oscillatory signals in correlation functions in two-field open inflation by means of the in-in formalism; such signatures are caused by resonances between oscillations in the tunnelling field and fluctuations in the inflaton during the curv
Externí odkaz:
http://arxiv.org/abs/1302.3877
Publikováno v:
JCAP 11 (2012) 062
We discuss preheating after multi-field inflation in the presence of several preheat matter fields that become light in the vicinity of (but not at) the inflatons' VEV, at distinct extra-species-points (ESP); this setup is motivated by inflationary m
Externí odkaz:
http://arxiv.org/abs/1209.3301
Publikováno v:
JCAP 06 (2012) 034
Based on random matrix theory, we compute the likelihood of saddles and minima in a class of random potentials that are softly bounded from above and below, as required for the validity of low energy effective theories. Imposing this bound leads to a
Externí odkaz:
http://arxiv.org/abs/1203.3941