Zobrazeno 1 - 10
of 247
pro vyhledávání: '"David, Skinner"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 7, Pp 1-16 (2024)
Abstract Celestial holography has led to the discovery of new symmetry algebras arising from the study of collinear limits of perturbative gravity amplitudes in flat space. We explain from the twistor perspective how a non-vanishing cosmological cons
Externí odkaz:
https://doaj.org/article/cbe7f1607533420fb66bb96b9963fc4a
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 9, Pp 1-45 (2023)
Abstract We consider the twistor description of classical self-dual Einstein gravity in the presence of a defect operator wrapping a certain ℂℙ1. The backreaction of this defect deforms the flat twistor space to that of Eguchi-Hanson space. We sh
Externí odkaz:
https://doaj.org/article/b7c6a539e3334e6987e71ac597f3aecd
Autor:
Paul J. M. Maas, Hiltje Maas-van de Kamer, Thiago André, David Skinner, Eugenio Valderrama, Chelsea D. Specht
Publikováno v:
PhytoKeys, Vol 222, Iss , Pp 75-127 (2023)
In preparation for a full taxonomic revision of the Neotropical genera of Costaceae (i.e., Chamaecostus, Costus, Dimerocostus, and Monocostus), we present the description of 17 new species of Neotropical Costus and one new species of the Neotropic en
Externí odkaz:
https://doaj.org/article/a45b8b90bb434db4b1ec0ab4fceac826
Autor:
Roland Bittleston, David Skinner
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 2, Pp 1-51 (2023)
Abstract We show that the approaches to integrable systems via 4d Chern-Simons theory and via symmetry reductions of the anti-self-dual Yang-Mills equations are closely related, at least classically. Following a suggestion of Kevin Costello, we start
Externí odkaz:
https://doaj.org/article/c0272d5869624d328a909dcecc0bc2f6
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 12, Pp 1-21 (2022)
Abstract We consider the Moyal deformation of self-dual gravity. In the conformal primary basis, holomorphic collinear limits of the amplitudes of this theory show that it enjoys a perturbatively exact symmetry algebra LW ∧ that generalises Lw ∧,
Externí odkaz:
https://doaj.org/article/7a826db281eb476b98ee30e7cc696e1a
Autor:
Kai Roehrig, David Skinner
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 2, Pp 1-39 (2022)
Abstract We construct an ambitwistor string that describes Type II supergravity on AdS3 ×S3 with pure NS flux. The background Einstein equations ensure that the model is anomaly free. The spectrum consists of supergravity fluctuations around this ba
Externí odkaz:
https://doaj.org/article/0138d464cdcd468c907b87814567b141
Autor:
James Binney, David Skinner
The Physics of Quantum Mechanics aims to give students a good understanding of how quantum mechanics describes the material world. It shows that the theory follows naturally from the use of probability amplitudes to derive probabilities. It stresses
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 8, Pp 1-35 (2021)
Abstract Ambitwistor strings are chiral (holomorphic) strings whose target is the space of complex null geodesics, ambitwistor space. We introduce twistor representations of ambitwistor space in 6 and 5 dimensions. In 6d the twistor representation is
Externí odkaz:
https://doaj.org/article/245fe1bf388347919ad01da9660e320e
Autor:
Roland Bittleston, David Skinner
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 6, Pp 1-35 (2020)
Abstract We consider the mixed topological-holomorphic Chern-Simons theory introduced by Costello, Yamazaki & Witten on a ℤ2 orbifold. We use this to construct semi- classical solutions of the boundary Yang-Baxter equation in the elliptic and trigo
Externí odkaz:
https://doaj.org/article/9e3be6ebb24a43afbb2d94ad1041341e
Autor:
David Skinner
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 4, Pp 1-52 (2020)
Abstract This paper presents a worldsheet theory describing holomorphic maps to twistor space with N $$ \mathcal{N} $$ fermionic directions. The theory is anomaly free when N $$ \mathcal{N} $$ = 8. Via the Penrose transform, the vertex operators corr
Externí odkaz:
https://doaj.org/article/3dd0d23370a0474d8b26aed9d27d8cea