Results 21 to 30 of about 162 (153)
International Journal of Aerospace Engineering, Volume 2021, Issue 1, 2021., 2021 In this paper, a bounded finite‐time control strategy is developed for the final proximity maneuver of spacecraft rendezvous and docking exposed to external disturbance and input quantization. To realize the integrated control for spacecraft final proximity operation, the coupling kinematics and dynamics of attitude and position are modeled by feat of ...
Sai Zhang, Zhen Yang, Juan Du
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DEFORMATION QUANTIZATION OF COADJOINT ORBITS [PDF]
International Journal of Modern Physics B, 2000 A method for the deformation quantization of coadjoint orbits of semisimple Lie groups is proposed. It is based on the algebraic structure of the orbit. Its relation to geometric quantization and differentiable deformations is explored.
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Kinematic space and the orbit method
Journal of High Energy Physics, 2019 Kinematic space has been defined as the space of codimension-2 spacelike extremal surfaces in anti de Sitter (AdS d+1) spacetime which, by the Ryu-Takayanagi proposal, compute the entanglement entropy of spheres in the boundary CFT d .
Robert F. Penna, Claire Zukowski
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Star products on coadjoint orbits [PDF]
Physics of Atomic Nuclei, 2001 We study properties of a family of algebraic star products defined on coadjoint orbits of semisimple Lie groups. We connect this description with the point of view of differentiable deformations and geometric quantization.
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Journal of High Energy Physics, 2020 We consider the (twisted) warped Virasoro group Diff(S 1)⋉C ∞ (S 1) in the presence of its three cocycles. We compute the Kirillov-Kostant-Souriau symplectic 2-form on coadjoint orbits.
Hamid R. Afshar
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Flat JT gravity and the BMS-Schwarzian
Journal of High Energy Physics, 2022 We consider Minkowskian Jackiw-Teitelboim (JT) gravity in Bondi gauge at finite temperature, with non-zero vacuum energy. Its asymptotic symmetries span an extension of the warped Virasoro group, dubbed ‘BMS2’, which we investigate in detail.
Hamid Afshar, Blagoje Oblak
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On Algebraic Supergroups, Coadjoint Orbits and Their Deformations [PDF]
Communications in Mathematical Physics, 2004 In this paper we study algebraic supergroups and their coadjoint orbits as affine algebraic supervarieties. We find an algebraic deformation quantization of them that can be related to the fuzzy spaces of non commutative geometry.
FIORESI, RITA, Lledo M. A.
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Journal of High Energy Physics, 2023 This is the second of a series of two papers devoted to the partition function realization of Wilson surfaces in strict higher gauge theory. A higher 2-dimensional counterpart of the topological coadjoint orbit quantum mechanical model computing Wilson ...
Roberto Zucchini
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Universal corner symmetry and the orbit method for gravity
Nuclear Physics B, 2023 A universal symmetry algebra organizing the gravitational phase space has been recently found. It corresponds to the subset of diffeomorphisms that become physical at corners – codimension-2 surfaces supporting Noether charges.
Luca Ciambelli, Robert G. Leigh
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The Mackey obstruction and the coadjoint orbits [PDF]
Transactions of the American Mathematical Society, 1994 This paper studies the Mackey obstruction representation theory at the coadjoint orbit level. It shows how to get rid of such obstructions and to get orbits of the "little groups". Such little group data is essential for inductive construction of coadjoint orbits of general Lie groups.
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