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pro vyhledávání: '"Brunetti, Romeo"'
Autor:
Abram, Valentino, Brunetti, Romeo
In this paper we study the foundations of the algebraic treatment of classical and quantum field theories for Dirac fermions under external backgrounds following the initial contributions made by several collegues. The treatment is restricted to cont
Externí odkaz:
http://arxiv.org/abs/2401.04555
Despite the fact that quantum gravity is non-renormalisable, a consistent and mathematically rigorous construction of a perturbation series is possible. This is based on the use of the Batalin-Vilkovisky-Becchi-Rouet-Stora-Tyutin formalism for gauge
Externí odkaz:
http://arxiv.org/abs/2212.07800
Autor:
Brunetti, Romeo, Moro, Andrea
Inspired by the recent algebraic approach to classical field theory, we propose a more general setting based on the manifold of smooth sections of a non-trivial fiber bundle. Central is the notion of observables over such sections, i.e. appropriate s
Externí odkaz:
http://arxiv.org/abs/2210.15062
The C*-algebraic construction of QFT by Buchholz and one of us relies on the causal structure of spacetime and a classical Lagrangian. In one of our previous papers we have introduced additional structure into this construction, namely an action of s
Externí odkaz:
http://arxiv.org/abs/2210.05908
The C*-algebraic formulation of generic interacting quantum field theories, recently presented by Detlev Buchholz and one of the authors (KF), is enriched by a unitary version of the Master Ward Identity, which was postulated some time ago by Franz M
Externí odkaz:
http://arxiv.org/abs/2108.13336
We extend the $C^*$-algebraic approach to interacting quantum field theory, proposed recently by Detlev Buchholz and one of us (KF) to Fermi fields. The crucial feature of our approach is the use of auxiliary Grassmann variables in a functorial way.<
Externí odkaz:
http://arxiv.org/abs/2103.05740
We construct states describing Bose Einstein condensates at finite temperature for a relativistic massive complex scalar field with $|\varphi|^4$-interaction. We start with the linearised theory over a classical condensate and construct interacting f
Externí odkaz:
http://arxiv.org/abs/1911.01829
Autor:
Brunetti, Romeo, Moro, Andrea
Publikováno v:
Annales Henri Poincaré; Sep2024, Vol. 25 Issue 9, p4195-4262, 68p
Autor:
Brunetti, Romeo, Fredenhagen, Klaus, Hack, Thomas-Paul, Pinamonti, Nicola, Rejzner, Katarzyna
It is shown how cosmological perturbation theory arises from a fully quantized perturbative theory of quantum gravity. Central for the derivation is a non-perturbative concept of gauge-invariant local observables by means of which perturbative invari
Externí odkaz:
http://arxiv.org/abs/1605.02573
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