Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Jan Ambjorn"'
Publikováno v:
Physics Letters B, Vol 816, Iss , Pp 136205- (2021)
We quantize the two-dimensional projectable Horǎva-Lifshitz gravity with a bi-local as well as space-like wormhole interaction. The resulting quantum Hamiltonian coincides with the one obtained through summing over all genus in the string field theo
Externí odkaz:
https://doaj.org/article/2e7acc8c1e624dabb47948dcdb2e2b7d
Publikováno v:
Frontiers in Physics, Vol 8 (2020)
A hallmark of non-perturbative theories of quantum gravity is the absence of a fixed background geometry, and therefore the absence in a Planckian regime of any notion of length or scale that is defined a priori. This has potentially far-reaching con
Externí odkaz:
https://doaj.org/article/67a27b71f5d24f4a89e32f2fd155292f
Autor:
Jan Ambjorn, Zbigniew Drogosz, Jakub Gizbert-Studnicki, Andrzej Görlich, Jerzy Jurkiewicz, Dániel Németh
Publikováno v:
Universe, Vol 7, Iss 4, p 79 (2021)
Lattice formulations of gravity can be used to study non-perturbative aspects of quantum gravity. Causal Dynamical Triangulations (CDT) is a lattice model of gravity that has been used in this way. It has a built-in time foliation but is coordinate-i
Externí odkaz:
https://doaj.org/article/02999c14ce3c4cb5bb92ef588ce5cf9b
Autor:
Jan Ambjorn
This graduate textbook provides an introduction to quantum gravity, when spacetime is two-dimensional. The quantization of gravity is the main missing piece of theoretical physics, but in two dimensions it can be done explicitly with elementary mathe
Publikováno v:
University of Copenhagen
The role of topology change in a fundamental theory of quantum gravity is still a matter of debate. However, when regarding string theory as two-dimensional quantum gravity, topological fluctuations are essential. Here we present a third quantization
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea261547cbcbfea68c6d0ac536c4e095
http://ora.ox.ac.uk/objects/uuid:efb471b7-7522-4200-a011-dcf3c94112c5
http://ora.ox.ac.uk/objects/uuid:efb471b7-7522-4200-a011-dcf3c94112c5
Publikováno v:
University of Copenhagen
We review a recently discovered continuum limit for the one-matrix model which describes "causal" two-dimensional quantum gravity. The behaviour of the quantum geometry in this limit is different from the quantum geometry of Euclidean two-dimensional
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d0c4d5ea5828c06d9ebcfdd9dc8f110
The express purpose of these lecture notes is to go through some aspects of the simplicial quantum gravity model known as the dynamical triangula tions approach. Emphasis has been on laying the foundations of the theory and on illustrating its subt
Publikováno v:
University of Helsinki
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a0f18471106d640343cfe49e725b772f
https://doi.org/10.1142/9789814527200
https://doi.org/10.1142/9789814527200
Scaling with a modified Wilson action which suppresses Z_2 artifacts in SU(2) lattice gauge theories
Autor:
Jan Ambjorn, Thorleifsson, G.
Publikováno v:
University of Copenhagen
A modified Wilson action which suppresses plaquettes which take negative values is used to study the scaling behavior of the string tension. The use of the $\b_E$ scheme gives good agreement with asymptotic two loop results.
Latex (ps figure app
Latex (ps figure app
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::962091cfa60f9918088216109899b7ab
http://arxiv.org/abs/hep-lat/9405022
http://arxiv.org/abs/hep-lat/9405022