Results 81 to 90 of about 32,626 (182)

On Gauge‐Invariant Entire Function Regulators and UV Finiteness in Non Local Quantum Field Theory

Annalen der Physik, Volume 538, Issue 4, April 2026.
We regulate the theory with an entire function of the covariant operator F(□/M∗2)$F(\square /M^{2}_{*})$. In the perturbative vacuum this becomes a momentum‐space factor F(−p2/M∗2)$F(-p^{2}/M^{2}_{*})$ that exponentially damps high momenta, most transparent after Wick rotation, rendering loop integrals UV finite.
J. W. Moffat, E. J. Thompson
wiley   +1 more source

Toward a QFT treatment of nonexponential decay

EPJ Web of Conferences, 2018
We study the properties of the survival probability of an unstable quantum state described by a Lee Hamiltonian. This theoretical approach resembles closely Quantum Field Theory (QFT): one can introduce in a rather simple framework the concept of ...
Giacosa Francesco
doaj   +1 more source

Aspects of perturbative unitarity

, 2016
We reconsider perturbative unitarity in quantum field theory and upgrade several arguments and results. The minimum assumptions that lead to the largest time equation, the cutting equations and the unitarity equation are identified.
Anselmi, Damiano
core   +1 more source

Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the String‐Theoretical Swampland Programme

Fortschritte der Physik, Volume 74, Issue 4, April 2026.
Abstract String theory has strong implications for cosmology, implying the absence of a cosmological constant, ruling out single‐field slow‐roll inflation, and that black holes decay. The origins of these statements are elucidated within the string‐theoretical swampland programme.
Kay Lehnert
wiley   +1 more source

Relationships among the First Variation, the Convolution Product, and the Fourier-Feynman Transform

Rocky Mountain Journal of Mathematics, 1998
The definitions of the \(L_p\)-Fourier-Feynman (FF) transform, convolution product and first variation for functionals over the Wiener space in the Cameron-Storvick Banach algebra \({\mathcal S}\) are briefly recalled. Relationships between these are established, expressing: (i) the FF-transform of the convolution product and the convolution product of
Park, Chull, Skough, David, Storvick, David   +2 more
openaire   +3 more sources

Electronic Correlation Effects in the Response of Graphene and MoS2 Monolayers to the Impact of Highly‐Charged Ions

physica status solidi (b), Volume 263, Issue 4, April 2026.
The response of graphene and MoS2 monolayers to highly‐charged impinging ions is investigated using nonequilibrium Green functions theory. Electronic correlations are found to have a significantly stronger influence on the ultrafast ion‐induced electron dynamics in MoS2 than in graphene.
Giorgio Lovato, Michael Bonitz, Karsten Balzer, Fabio Caruso, Jan‐Philip Joost   +4 more
wiley   +1 more source

On time-dependent AdS/CFT

, 2003
We clarify aspects of the holographic AdS/CFT correspondence that are typical of Lorentzian signature, to lay the foundation for a treatment of time-dependent gravity and conformal field theory phenomena.
C.P. Herzog, D.T. Son, E. Witten, E. Witten, E.C. Titchmarsh, I. Gel'fand, I.R. Klebanov, J.M. Maldacena, J.M. Maldacena, J.S. Schwinger, Jan Troost, K. Gawedzki, L. Mezincescu, L. Susskind, L.V. Keldysh, M. Abramowitz, M. Bertola, M. Reed, M. Spradlin, N. Birrell, P. Breitenlohner, P. Minces, P. Morse, P.M. Bakshi, P.M. Bakshi, U.H. Danielsson, V. Balasubramanian, Y. Brychkov, Yuji Satoh   +28 more
core   +1 more source

Integrated Experimental and Theoretical Insights into Defect‐Induced Functionalities of Cobalt Doped NiO for Multifunctional Solar‐Driven Applications

Advanced Energy and Sustainability Research, Volume 7, Issue 3, March 2026.
Rational defect engineering in Co‐doped NiO nanostructures, synthesized via a sustainable green route, enables precise bandgap modulation and defect‐state tailoring. Combined experimental–density functional theory analysis identifies 15% Co doping as the optimal threshold for maximizing photocatalytic degradation, photothermal response, and hydrogen ...
Sumayya M. Ansari, Hessa Alashkhari, Meira Alabdouli, Zahra Alzadjali, Sara Almuhairi, Narender Kumar, Naveen Kosar, Tariq Mahmood, Adnan Younis   +8 more
wiley   +1 more source

Feynman rules and loop structure of Carrollian amplitudes

Journal of High Energy Physics
In this paper, we derive the Carrollian amplitude in the framework of bulk reduction. The Carrollian amplitude is shown to relate to the scattering amplitude by a Fourier transform in this method.
Wen-Bin Liu, Jiang Long, Xiao-Quan Ye
doaj   +1 more source

Group field theory and simplicial gravity path integrals: A model for Holst-Plebanski gravity

, 2011
In a recent work, a dual formulation of group field theories as non-commutative quantum field theories has been proposed, providing an exact duality between spin foam models and non-commutative simplicial path integrals for constrained BF theories.
Aristide Baratin, C. Rovelli, D. Oriti, Daniele Oriti, J. C. Baez, L. Freidel, S. Majid, V. Rivasseau   +7 more
core   +2 more sources