Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Hanno Sahlmann"'
Autor:
Refik Mansuroglu, Hanno Sahlmann
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 2, Pp 1-26 (2023)
Abstract Perfect tensors describe highly entangled quantum states that have attracted particular attention in the fields of quantum information theory and quantum gravity. In loop quantum gravity, the natural question arises whether SU(2) invariant t
Externí odkaz:
https://doaj.org/article/27e5fd7b074b483ab7ea76caad33dd85
Autor:
Konstantin Eder, Hanno Sahlmann
Publikováno v:
Universe, Vol 9, Iss 7, p 303 (2023)
Recent work has shown that local supersymmetry on a spacetime boundary in N-extended AdS supergravity in chiral variables implies coupling to a boundary OSp(N|2)C super Chern–Simons theory. Consequently there has been a proposal to define and calcu
Externí odkaz:
https://doaj.org/article/e1c2b22ea2e94514879874e73f80835e
Autor:
Daniele Pranzetti, Hanno Sahlmann
Publikováno v:
Physics Letters B, Vol 746, Iss , Pp 209-216 (2015)
We show that the spherically symmetric isolated horizon can be described in terms of an SU(2) connection and an su(2)-valued one-form, obeying certain constraints. The horizon symplectic structure is precisely the one of 3d gravity in a first order f
Externí odkaz:
https://doaj.org/article/c5f0362784f74be8898292a630195950
Autor:
Hanno Sahlmann, Tim Koslowski
Publikováno v:
Symmetry, Integrability and Geometry: Methods and Applications, Vol 8, p 026 (2012)
In loop quantum gravity, states of the gravitational field turn out to be excitations over a vacuum state that is sharply peaked on a degenerate spatial geometry. While this vacuum is singled out as fundamental due to its invariance properties, it is
Externí odkaz:
https://doaj.org/article/fc1d6cddf0e7404ca471a8b46cbf7762
Autor:
Konstantin Eder, Hanno Sahlmann
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 7, Pp 1-39 (2021)
Journal of High Energy Physics
Journal of High Energy Physics
In this article, the Cartan geometric approach toward (extended) supergravity in the presence of boundaries will be discussed. In particular, based on new developments in this field, we will derive the Holst variant of the MacDowell-Mansouri action f
Autor:
Konstantin Eder, Hanno Sahlmann
Recently, many geometric aspects of $\mathcal{N}$-extended AdS supergravity in chiral variables have been encountered and clarified. In particular, if the theory is supposed to be invariant under SUSY transformations also on boundaries, the boundary
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc527161e8e90f808a9ca18c107a3b1a
Autor:
Hanno Sahlmann, Refik Mansuroglu
Publikováno v:
Physical Review D. 103
Loop quantum gravity envisions a small scale structure of spacetime that is markedly different from that of the classical spacetime continuum. This has ramifications for the excitation of matter fields and for their coupling to gravity. There is a ge
Autor:
Hanno Sahlmann, Refik Mansuroglu
Publikováno v:
Physical Review D. 103
We define and study kinematical observables involving fermion spin, such as the total spin of a collection of particles, in loop quantum gravity. Due to the requirement of gauge invariance, the relevant quantum states contain strong entanglement betw
Autor:
Konstantin Eder, Hanno Sahlmann
Publikováno v:
Journal of High Energy Physics
Journal of High Energy Physics, Vol 2021, Iss 3, Pp 1-46 (2021)
Journal of High Energy Physics, Vol 2021, Iss 3, Pp 1-46 (2021)
In this paper, we study a class of symmetry reduced models of $\mathcal{N}=1$ supergravity using self-dual variables. It is based on a particular Ansatz for the gravitino field as proposed by D'Eath et al. We show that the essential part of the const
Autor:
Konstantin Eder, Hanno Sahlmann
Publikováno v:
Physical Review D. 103
In this paper, the classical and quantum theory of $\mathcal{N}=1$ supergravity in four spacetime dimensions will be studied in the framework of loop quantum gravity. We discuss the canonical analysis of the supergravity Holst action as first introdu