Results 21 to 30 of about 436,858 (367)
Semiclassical limit of new path integral formulation from reduced phase space loop quantum gravity [PDF]
, 2020 Recently, a new path integral formulation of Loop Quantum Gravity (LQG) has been derived in arXiv:1910.03763 from the reduced phase space formulation of the canonical LQG. This paper focuses on the semiclassical analysis of this path integral formulation.
Muxin Han, Hongguang Liu
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Lorentzian path integral for quantum tunneling and WKB approximation for wave-function
European Physical Journal C: Particles and Fields, 2022 Recently, the Lorentzian path integral formulation using the Picard–Lefschetz theory has attracted much attention in quantum cosmology. In this paper, we analyze the tunneling amplitude in quantum mechanics by using the Lorentzian Picard–Lefschetz ...
Hiroki Matsui
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Time-Slicing Path-integral in Curved Space [PDF]
Quantum, 2022 Path integrals constitute powerful representations for both quantum and stochastic dynamics. Yet despite many decades of intensive studies, there is no consensus on how to formulate them for dynamics in curved space, or how to make them covariant with ...
Mingnan Ding, Xiangjun Xing
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S-matrix path integral approach to symmetries and soft theorems [PDF]
Journal of High Energy Physics, 2023 We explore a formulation of the S-matrix in terms of the path integral with specified asymptotic data, as originally proposed by Arefeva, Faddeev, and Slavnov.
Seolhwa Kim +3 more
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Effective Actions for Regge Piecewise Flat Quantum Gravity
Universe, 2022 We review the construction of the path integral and the corresponding effective action for the Regge formulation of General Relativity under the assumption that the short-distance structure of the spacetime is not a smooth 4-manifold, but a piecewise ...
Aleksandar Miković
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Path-integral formulation of closed strings [PDF]
Physical Review D, 1987 We construct the covariant path integral for the Neveu-Schwarz-Ramond superstring in superspace, with manifest invariance under diffeomorphisms and local supersymmetry transformations. Spin structure is introduced, and the constraints imposed by modular invariance on fermionic string models examined.
Chaudhuri, Shyamoli R. +2 more
openaire +3 more sources
Symmetries in the path integral formulation of the Langevin dynamics [PDF]
Physical Review E, 2017 We study a dissipative Langevin dynamics in the path integral formulation using the Martin-Siggia-Rose formalism. The effective action is supersymmetric and we identify the supercharges.
Piotr Sur'owka, P. Witkowski
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Pauli-Villars’ regularization of ghosts in path-integral string formulation
Journal of High Energy Physics, 2023 I consider Pauli-Villars’ regulators for the ghosts in the path-integral string formulation and show how they preserve conformal invariance. I calculate the regulator contributions to the effective action and to the central charge and demonstrate the ...
Yuri Makeenko
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Path integral implementation of relational quantum mechanics
Scientific Reports, 2021 Relational formulation of quantum mechanics is based on the idea that relational properties among quantum systems, instead of the independent properties of a quantum system, are the most fundamental elements to construct quantum mechanics.
Jianhao M. Yang
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T T ¯ $$ T\overline{T} $$ + Λ2 from a 2d gravity path integral
Journal of High Energy Physics, 2023 We develop a two-dimensional gravity path integral formulation of the T T ¯ $$ T\overline{T} $$ + Λ2 deformation of quantum field theory. This provides an exactly solvable generalization of the pure T T ¯ $$ T\overline{T} $$ deformation that is relevant ...
Gonzalo Torroba
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