Zobrazeno 1 - 10
of 148
pro vyhledávání: '"Thomas Thiemann"'
Autor:
Renata Ferrero, Thomas Thiemann
Publikováno v:
Universe, Vol 10, Iss 11, p 410 (2024)
In a recent contribution, we identified possible points of contact between the asymptotically safe and canonical approaches to quantum gravity. The idea is to start from the reduced phase space (often called relational) formulation of canonical quant
Externí odkaz:
https://doaj.org/article/42d0a40f79274283a15517cd969ee2bb
Autor:
Thomas Thiemann
Publikováno v:
Universe, Vol 10, Iss 9, p 372 (2024)
In a seminal work, Hawking showed that natural states for free quantum matter fields on classical spacetimes that solve the spherically symmetric vacuum Einstein equations are KMS states of non-vanishing temperature. Although Hawking’s calculation
Externí odkaz:
https://doaj.org/article/ab0cda1631794295acc7130f87c11464
Autor:
Thomas Thiemann, Madhavan Varadarajan
Publikováno v:
Universe, Vol 8, Iss 12, p 615 (2022)
A rigorous implementation of the Wheeler–Dewitt equations was derived in the context of Loop Quantum Gravity (LQG) and was coined Quantum Spin Dynamics (QSD). The Hamiltonian constraint of QSD was criticised as being too local and to prevent “pro
Externí odkaz:
https://doaj.org/article/8468922978ca404f8f764d8ad377c35a
Autor:
Thomas Thiemann
Publikováno v:
Frontiers in Physics, Vol 8 (2020)
The canonical approach to quantum gravity has been put on a firm mathematical foundation in the recent decades. Even the quantum dynamics can be rigorously defined, however, due to the tremendously non-polynomial character of the gravitational intera
Externí odkaz:
https://doaj.org/article/fb0c716bde7c4cfa87caae33c8a5f072
Publikováno v:
Universe, Vol 7, Iss 3, p 68 (2021)
A generally covariant U(1)3 gauge theory describing the GN→0 limit of Euclidean general relativity is an interesting test laboratory for general relativity, specially because the algebra of the Hamiltonian and diffeomorphism constraints of this lim
Externí odkaz:
https://doaj.org/article/968c8f65d2bd42e8ab12f25d993d7dca
Publikováno v:
New Journal of Physics, Vol 14, Iss 10, p 103054 (2012)
Spin foam models are an attempt at a covariant or path integral formulation of canonical loop quantum gravity. The construction of such models usually relies on the Plebanski formulation of general relativity as a constrained BF theory and is based o
Externí odkaz:
https://doaj.org/article/4cd472a9c3264608a52e35a0776b9cd2
Autor:
Thomas Thiemann
Modern physics rests on two fundamental building blocks: general relativity and quantum theory. General relativity is a geometric interpretation of gravity while quantum theory governs the microscopic behaviour of matter. Since matter is described by
Autor:
Thomas Thiemann, Armin Schnettler
Publikováno v:
BWK ENERGIE.. 71:46-49
Die Energiewende wird immer vielschichtiger. Gilt es doch, die losen Enden aus erneuerbaren Energien, Energieträgern, Speichern, Netzausbau und vorhandener Infrastrukturen in einem System zusammenzufassen – gesellschaftlich, ökonomisch und techni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::20aee25d8e2cee161208ca8d736efa00
https://doi.org/10.37544/1618-193x-2019-10-46
https://doi.org/10.37544/1618-193x-2019-10-46
Autor:
Klaus Liegener, Thomas Thiemann
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 7 (2021)
In a recent proposal we applied methods from constructive QFT to derive a Hamiltonian Renormalisation Group in order to employ it ultimately for canonical quantum gravity. The proposal was successfully tested for free scalar fields and thus a natural
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4011bacc7b9e275e322a82d6873845a4
https://doi.org/10.3389/fspas.2020.547550
https://doi.org/10.3389/fspas.2020.547550
Autor:
Sepideh Bakhoda, Thomas Thiemann
The utility of the U(1)$^3$ model as a test laboratory for quantum gravity has recently been emphasized in a recent series of papers due to Varadarajan et al. The simplification from SU(2) to U(1)$^3$ can be performed simply by hand within the Hamilt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6571f6135a79e441efc74ea26f3b2340