Results 11 to 20 of about 7,248 (254)
Complexity from spinning primaries
Journal of High Energy Physics, 2021 We define circuits given by unitary representations of Lorentzian conformal field theory in 3 and 4 dimensions. Our circuits start from a spinning primary state, allowing us to generalize formulas for the circuit complexity obtained from circuits ...
Robert de Mello Koch +2 more
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Fundamental domains in Lorentzian geometry [PDF]
Geometriae Dedicata, 2007 We consider discrete subgroups Gamma of the simply connected Lie group SU~(1,1), the universal cover of SU(1,1), of finite level, i.e. the subgroup intersects the centre of SU~(1,1) in a subgroup of finite index, this index is called the level of the group.
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Background field method for nonlinear sigma models in nonrelativistic string theory
Journal of High Energy Physics, 2020 We continue the study of nonrelativistic string theory in background fields. Nonrelativistic string theory is described by a nonlinear sigma model that maps a relativistic worldsheet to a non-Lorentzian and non-Riemannian target space geometry, which is ...
Ziqi Yan, Matthew Yu
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Geodesic motion in Euclidean Schwarzschild geometry
European Physical Journal C: Particles and Fields, 2022 This paper performs a systematic investigation of geodesic motion in Euclidean Schwarzschild geometry, which is studied in the equatorial plane. The explicit form of geodesic motion is obtained in terms of incomplete elliptic integrals of first, second ...
Emmanuele Battista, Giampiero Esposito
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Covariant Wick rotation: action, entropy, and holonomies
European Physical Journal C: Particles and Fields, 2023 Given an arbitrary Lorentzian metric $$g_{ab}$$ g ab and a nowhere vanishing, timelike vector field $$u^a$$ u a , one can construct a class of metrics $${\widehat{g}}_{ab}$$ g ^ ab which have Euclidean signature in a specific domain, with a transition to
Raghvendra Singh, Dawood Kothawala
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Stringy Bubbles Solve de Sitter Troubles
Universe, 2021 Finding four-dimensional de Sitter spacetime solutions in string theory has been a vexing quest ever since the discovery of the accelerating expansion of the universe.
Per Berglund +2 more
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The Geometry of Noncommutative Spacetimes
Universe, 2017 We review the concept of ‘noncommutative spacetime’ approached from an operational stand-point and explain how to endow it with suitable geometrical structures. The latter involves i.a.
Michał Eckstein
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Aspects of Nonrelativistic Strings
Frontiers in Physics, 2022 We review recent developments on nonrelativistic string theory. In flat spacetime, the theory is defined by a two-dimensional relativistic quantum field theory with nonrelativistic global symmetries acting on the worldsheet fields.
Gerben Oling, Gerben Oling, Ziqi Yan
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Lorentzian geometry in the large [PDF]
Banach Center Publications, 1997 Lorentzian geometry in the large has certain similarities and certain fundamental differences from Riemannian geometry in the large. The Morse index theory for timelike geodesics is quite similar to the corresponding theory for Riemannian manifolds. However, results on completeness for Lorentzian manifolds are quite different from the corresponding ...
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Horizon strings and interior states of a black hole
Physics Letters B, 2015 We provide an explicit construction of classical strings that have endpoints on the horizons of the 2D Lorentzian black hole. We argue that this is a dual description of geodesics that are localized around the horizon which are the Lorentzian ...
K.P. Yogendran
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