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pro vyhledávání: '"Bogna, Giuseppe"'
Autor:
Bogna, Giuseppe, Heuveline, Simon
In this note, we show that several self-dual spacetimes previously studied in the context of celestial and twisted holography arise as limits of a certain Taub-NUT AdS$_4$ metric, the Pedersen metric, in which their Mass, NUT charge and cosmological
Externí odkaz:
http://arxiv.org/abs/2408.14324
The computation of scattering amplitudes in the presence of non-trivial background gauge fields is an important but extremely difficult problem in quantum field theory. In even the simplest backgrounds, obtaining explicit formulae for processes invol
Externí odkaz:
http://arxiv.org/abs/2406.09165
Autor:
Bittleston, Roland, Bogna, Giuseppe, Heuveline, Simon, Kmec, Adam, Mason, Lionel, Skinner, David
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 constant $\La
Externí odkaz:
http://arxiv.org/abs/2403.18011
We derive exact solutions of massless free field equations and tree-level two-point amplitudes up to spin 2 on self-dual Taub-NUT space-time, as well as on its single copy, the self-dual dyon. We use Killing spinors to build analogues of momentum eig
Externí odkaz:
http://arxiv.org/abs/2309.03834
Autor:
Bogna, Giuseppe, Mason, Lionel
The construction of perturbative quantities on non-linear backgrounds leads to the possibility of incorporating strong field effects in perturbation theory. We continue a programme to construct QFT observables on self-dual backgrounds. The approach w
Externí odkaz:
http://arxiv.org/abs/2305.07542
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