Results 31 to 40 of about 89,565 (306)

8T - Feynman Path Integral Variation

, 2021
This paper is analyzing the 8-theory framework and the Feynman path integral formulation and seek to reach a synthesis which will lead to an effective technique of finding transition amplitudes on Lorentz Manifolds.
Manor Ohad
core   +1 more source

A New Space-Time Theory Unravels the Origins of Classical Mechanics for the Dirac Equation

Quantum Reports
The Feynman path integral plays a central role in quantum mechanics, linking classical action to propagators and relating quantum electrodynamics (QED) to Feynman diagrams.
Wei Wen
doaj   +1 more source

Effective diffusion of a tracer in active bath: A path-integral approach

National Science Open
We investigate the effective diffusion of a tracer immersed in an active particle bath consisting of self-propelled particles. Utilising the Dean's method developed for the equilibrium bath and extending it to the nonequilibrium situation, we derive a ...
Feng Mengkai, Hou Zhonghuai
doaj   +1 more source

Path integrals of the vector field: Covariance of a path integral

Progress of Theoretical and Experimental Physics, 2019
On the basis of the canonical quantization procedure of a system defined on a cubic lattice, we propose a new method, in which resolutions of unity expressed in terms of eigenvectors are naturally provided, to find eigenvectors of field operators. By making use of fundamental ingredients thus obtained, we derive time sliced path integral formulae for a
openaire   +2 more sources

DISCRETIZATION OF THE SUPERPARTICLE PATH INTEGRAL [PDF]

Modern Physics Letters A, 1993
We investigate the hitherto unexplored relation between the superparticle path integral and superfield theory. Requiring that the path integral has the global symmetries of the classical action and obeys the natural composition property of path integrals, and also that the discretized action has the correct naive continuum limit, we find a viable ...
Grundberg, J., Lindström, U., Nordström, H.   +2 more
openaire   +2 more sources

Diversity and complexity in neural organoids

FEBS Letters, EarlyView.
Neural organoid research aims to expand genetic diversity on one side and increase tissue complexity on the other. Chimeroids integrate multiple donor genomes within single organoids. Self‐organising multi‐identity organoids, exogenous cell seeding, or enforced assembly of region‐specific organoids contribute to tissue complexity.
Ilaria Chiaradia, Madeline A. Lancaster
wiley   +1 more source

Three phosphatase families form a community: The phosphohydrolases that act upon inositol pyrophosphates

FEBS Letters, EarlyView.
Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley   +1 more source

Chern-Simons Path Integrals in S2 × S1

Mathematics, 2015
Using torus gauge fixing, Hahn in 2008 wrote down an expression for a Chern-Simons path integral to compute the Wilson Loop observable, using the Chern-Simons action \(S_{CS}^\kappa\), \(\kappa\) is some parameter.
Adrian P. C. Lim
doaj   +1 more source

Propagators and path integrals [PDF]

Nuclear Physics B, 1995
35 pages, latex, no figures, additional references; to be published in Nucl.
openaire   +3 more sources

Reconstructing enzyme evolution by protein engineering

FEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler, Markus R. Busch, Reinhard Sterner   +2 more
wiley   +1 more source