Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Jeremiah Birrell"'
Publikováno v:
Universe, Vol 9, Iss 7, p 309 (2023)
We offer a survey of the matter-antimatter evolution within the primordial Universe. While the origin of the tiny matter-antimatter asymmetry has remained one of the big questions in modern cosmology, antimatter itself has played a large role for muc
Externí odkaz:
https://doaj.org/article/779dffdac6da43eb95408ef676832222
Autor:
Jeremiah Birrell, Johann Rafelski
Publikováno v:
Physics Letters B, Vol 741, Iss , Pp 77-81 (2015)
The effective number of neutrinos, Neff, obtained from CMB fluctuations accounts for all effectively massless degrees of freedom present in the Universe, including but not limited to the three known neutrinos. Using a lattice-QCD derived QGP equation
Externí odkaz:
https://doaj.org/article/0c42cf7e8f034b2bb604e5491b0dea22
Publikováno v:
Nuclear Physics B, Vol 890, Iss , Pp 481-517 (2015)
Analysis of cosmic microwave background radiation fluctuations favors an effective number of neutrinos, Nν>3. This motivates a reinvestigation of the neutrino freeze-out process. Here we characterize the dependence of Nν on the Standard Model (SM)
Externí odkaz:
https://doaj.org/article/f2f93471075c4624ac269b5201ca7aa0
Publikováno v:
ESAIM: Mathematical Modelling and Numerical Analysis. 55:131-169
Quantifying the impact of parametric and model-form uncertainty on the predictions of stochastic models is a key challenge in many applications. Previous work has shown that the relative entropy rate is an effective tool for deriving path-space uncer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd1c8e3a93f33184380934e698d980c2
https://doi.org/10.1051/m2an/2020070
https://doi.org/10.1051/m2an/2020070
Publikováno v:
SIAM Journal on Mathematics of Data Science. 3:1093-1116
We derive a new variational formula for the Renyi family of divergences, $R_\alpha(Q\|P)$, between probability measures $Q$ and $P$. Our result generalizes the classical Donsker--Varadhan variation...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af7f177f90b5f4fc90125f826556fd32
https://doi.org/10.1137/20m1368926
https://doi.org/10.1137/20m1368926
Autor:
Jeremiah Birrell, Jan Wehr
Publikováno v:
Annales Henri Poincaré. 21:1765-1811
We study the small-mass (overdamped) limit of Langevin equations for a particle in a potential and/or magnetic field with matrix-valued and state-dependent drift and diffusion. We utilize a bootstrapping argument to derive a hierarchy of approximate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::96399bb9ff2d76de7db6467a9476322e
https://doi.org/10.1007/s00023-020-00910-8
https://doi.org/10.1007/s00023-020-00910-8
Publikováno v:
Markos A. Katsoulakis
Generative adversarial networks (GANs), a class of distribution-learning methods based on a two-player game between a generator and a discriminator, can generally be formulated as a minmax problem based on the variational representation of a divergen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::189683ce8c13c677a3a19d6ed89a1afd
Publikováno v:
Markos A. Katsoulakis
We develop a rigorous and general framework for constructing information-theoretic divergences that subsume both $f$-divergences and integral probability metrics (IPMs), such as the $1$-Wasserstein distance. We prove under which assumptions these div
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=arXiv_dedup_::109456a35e43ce68c8a70b1532e63bab
http://arxiv.org/abs/2011.05953
http://arxiv.org/abs/2011.05953
Variational representations of divergences and distances between high-dimensional probability distributions offer significant theoretical insights and practical advantages in numerous research areas. Recently, they have gained popularity in machine l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11ed33cbc5a57004fbf40f503c051abd
Autor:
Jeremiah Birrell
Publikováno v:
Journal of Statistical Physics. 173:1549-1586
We investigate entropy production in the small-mass (or overdamped) limit of Langevin-Kramers dynamics. The results generalize previous works to provide a rigorous derivation that covers systems with magnetic field as well as anisotropic (i.e. matrix
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::611cf4067d6db8f74984f75047951ec9
https://doi.org/10.1007/s10955-018-2162-2
https://doi.org/10.1007/s10955-018-2162-2