Results 61 to 70 of about 64,609 (182)

Analyticity and unitarity for cosmological correlators

Journal of High Energy Physics, 2022
We study the fundamentals of quantum field theory on a rigid de Sitter space. We show that the perturbative expansion of late-time correlation functions to all orders can be equivalently generated by a non-unitary Lagrangian on a Euclidean AdS geometry ...
Lorenzo Di Pietro, Victor Gorbenko, Shota Komatsu   +2 more
doaj   +1 more source

Quantum Field Theory of Correlated Bose–Einstein Condensates: II. Ward–Takahashi Identities and Correlation Functions [PDF]

, 2021
Kita Takafumi
openalex   +1 more source

Entanglement properties of boundary state and thermalization

Journal of High Energy Physics, 2018
We discuss the regularized boundary state e−τ0H|Ba $$ {e}^{-{\tau}_0H}\Big|{\left.B\right\rangle}_a $$ on two aspects in both 2D CFT and higher dimensional free field theory.
Wu-zhong Guo
doaj   +1 more source

Form factors and correlation functions of $$ \textrm{T}\overline{\textrm{T}} $$-deformed integrable quantum field theories [PDF]

, 2023
Olalla A. Castro-Alvaredo, Stefano Negro, Fabio Sailis   +2 more
openalex   +1 more source

Efficient Atomistic Simulation of Heterostructure Field-Effect Transistors

IEEE Journal of the Electron Devices Society, 2019
In this paper, atomistic-level quantum mechanical simulations are performed for nanoscale field-effect transistors (FETs) with lateral or vertical heterojunction, within the non-equilibrium Green's function formalism.
Yongsoo Ahn, Mincheol Shin
doaj   +1 more source

A comprehensive study of particle dynamics, thermal fluctuations with Barrow entropy, and greybody factors of quantum-improved charged black holes

European Physical Journal C: Particles and Fields
This study examines the characteristics and behavior of quantum-improved charged black holes, focusing on the relationships between mass, charge, and the quantum-improved parameter. We explore the consequences of these characteristics on the structure of
Ghulam Fatima, Tao Zhu, Faisal Javed, Arfa Waseem, G. Mustafa   +4 more
doaj   +1 more source

Correlation Functions in 2-Dimensional Integrable Quantum Field Theories [PDF]

, 2022
Giuseppe Mussardo
openalex   +1 more source

IR finite correlation functions in de Sitter space, a smooth massless limit, and an autonomous equation

Journal of High Energy Physics
We explore two-point and four-point correlation functions of a massive scalar field on the flat de Sitter background in the long-wavelength approximation.
Alexander Kamenshchik, Polina Petriakova
doaj   +1 more source

De Sitter at all loops: the story of the Schwinger model

Journal of High Energy Physics
We consider the two-dimensional Schwinger model of a massless charged fermion coupled to an Abelian gauge field on a fixed de Sitter background. The theory admits an exact solution, first examined by Jayewardena, and can be analyzed efficiently using ...
Dionysios Anninos, Tarek Anous, Alan Rios Fukelman   +2 more
doaj   +1 more source

Quantum Fields on Noncommutative Spacetimes: Theory and Phenomenology

Symmetry, Integrability and Geometry: Methods and Applications, 2010
In the present work we review the twisted field construction of quantum field theory on noncommutative spacetimes based on twisted Poincaré invariance.
Aiyalam P. Balachandran, Alberto Ibort, Giuseppe Marmo, Mario Martone   +3 more
doaj   +1 more source