Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Niels A. Obers"'
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 12, Pp 1-35 (2023)
Abstract It is well known that one can take an infinite speed of light limit that gives rise to non-relativistic strings with a relativistic worldsheet sigma model but with a non-relativistic target space geometry. In this work we systematically expl
Externí odkaz:
https://doaj.org/article/cf2747b1c036474b9d2b66fc4f8a092f
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 9, Pp 1-59 (2023)
Abstract We study various aspects of the Carroll limit in which the speed of light is sent to zero. A large part of this paper is devoted to the quantization of Carroll field theories. We show that these exhibit infinite degeneracies in the spectrum
Externí odkaz:
https://doaj.org/article/ca0f5d7fa5914b1abe7047f5834c5121
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 2, Pp 1-36 (2022)
Abstract We revisit the formulation of non-relativistic (NR) string theory and its target space geometry. We obtain a new formulation in which the geometry contains a two-form field that couples to the tension current and that transforms under string
Externí odkaz:
https://doaj.org/article/cbfa2736626a4805a686f047852af683
Publikováno v:
Frontiers in Physics, Vol 11 (2023)
This study reviews the history of Newton–Cartan (NC) gravity with an emphasis on recent developments, including the covariant, off-shell large speed of light expansion of general relativity. Depending on the matter content, this expansion leads to
Externí odkaz:
https://doaj.org/article/2ae4c33412924e2bab7d525ec74450a9
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 3, Pp 1-30 (2021)
Abstract Spin Matrix theory (SMT) limits provide a way to capture the dynamics of the AdS/CFT correspondence near BPS bounds. On the string theory side, these limits result in non-relativistic sigma models that can be interpreted as novel non-relativ
Externí odkaz:
https://doaj.org/article/94cb51c4378a408e941913c189c8b18a
Publikováno v:
Frontiers in Physics, Vol 10 (2022)
Carroll symmetry arises from Poincaré symmetry upon taking the limit of vanishing speed of light. We determine the constraints on the energy-momentum tensor implied by Carroll symmetry and show that for energy-momentum tensors of perfect fluid form,
Externí odkaz:
https://doaj.org/article/8c8c2eadbae04350aac642d925c24322
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 6, Pp 1-100 (2020)
Abstract We study the non-relativistic expansion of general relativity coupled to matter. This is done by expanding the metric and matter fields analytically in powers of 1/c 2 where c is the speed of light. In order to perform this expansion it is s
Externí odkaz:
https://doaj.org/article/8994b00847784afd8edac7e52ec13665
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 11, Pp 1-32 (2019)
Abstract Non-relativistic string theories promise to provide simpler theories of quantum gravity as well as tractable limits of the AdS/CFT correspondence. However, several apparently distinct non-relativistic string theories have been constructed. I
Externí odkaz:
https://doaj.org/article/b1f6f2d2218041d5911c7a339a5f87c4
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 8, Pp 1-37 (2019)
Abstract We use blackfold methods to analyse the properties of putative supergravity solutions in M-theory that describe the backreaction of polarised anti-M2 branes (namely, M5 branes wrapping three-cycles with negative M2-brane charge) in the Cveti
Externí odkaz:
https://doaj.org/article/9a67cc4c68bf4e33aa9b47de4cca9b6a
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 11, Pp 1-28 (2018)
Abstract We find a Polyakov-type action for strings moving in a torsional Newton-Cartan geometry. This is obtained by starting with the relativistic Polyakov action and fixing the momentum of the string along a non-compact null isometry. For a flat t
Externí odkaz:
https://doaj.org/article/3ad071841c054b10a59d2c9d56dac297