QED Predictions of fine structure constant and g-factor

curtdbz
Messages
24
Reaction score
0
Hi, I know QED is one of the most tested theories in all of science (and one of the most accurate) but I wanted to know if it disagreed at ALL with its predicted values of both

http://en.wikipedia.org/wiki/Fine_structure_constant
http://en.wikipedia.org/wiki/G-factor_(physics )

The thing I keep reading is that it is the "most accurate", but does that mean exactly accurate to within the uncertainties of the experiment (and uncertainties of prediction), or does it differ by a very tiny amount even given the uncertainties. That's it, thanks!

PS: I can only find what the current most accurate measurements are of those two constants, but not what our current theory of QED predicts them to be, else I'd just compare myself.
 
Last edited by a moderator:
Physics news on Phys.org
Not an expert in QM. AFAIK, Schrödinger's equation is quite different from the classical wave equation. The former is an equation for the dynamics of the state of a (quantum?) system, the latter is an equation for the dynamics of a (classical) degree of freedom. As a matter of fact, Schrödinger's equation is first order in time derivatives, while the classical wave equation is second order. But, AFAIK, Schrödinger's equation is a wave equation; only its interpretation makes it non-classical...
Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. Towards the end of the first lecture for the Qiskit Global Summer School 2025, Foundations of Quantum Mechanics, Olivia Lanes (Global Lead, Content and Education IBM) stated... Source: https://www.physicsforums.com/insights/quantum-entanglement-is-a-kinematic-fact-not-a-dynamical-effect/ by @RUTA
Is it possible, and fruitful, to use certain conceptual and technical tools from effective field theory (coarse-graining/integrating-out, power-counting, matching, RG) to think about the relationship between the fundamental (quantum) and the emergent (classical), both to account for the quasi-autonomy of the classical level and to quantify residual quantum corrections? By “emergent,” I mean the following: after integrating out fast/irrelevant quantum degrees of freedom (high-energy modes...
Back
Top