In euclidean quantum field theory, the imaginary part of the free energy, defined as the logaritm of the partition function, is it connected to the decay rate?
The free energy has two types of components, one without Levi-Civita pseudotensor (normal parity) and another with the epsilon tensor (abnormal parity).
In Euclidean field theory the normal parity component is always real, and the abnormal parity component is imaginary (see e.g.,
L. Alvarez-Gaume. E. Witten, Nucl.Phys. B234 (1984) 269).
In Minkowskian space both components are real if there is no phase space to decay, but develop an imaginary part above threshold (decay, inelastic channels, etc).
I read Hanbury Brown and Twiss's experiment is using one beam but split into two to test their correlation.
It said the traditional correlation test were using two beams........
This confused me, sorry.
All the correlation tests I learnt such as Stern-Gerlash are using one beam? (Sorry if I am wrong)
I was also told traditional interferometers are concerning about amplitude but Hanbury Brown and Twiss were concerning about intensity?
Isn't the square of amplitude is the intensity?
Please...
I am not sure if this belongs in the biology section, but it appears more of a quantum physics question.
Mike Wiest, Associate Professor of Neuroscience at Wellesley College in the US. In 2024 he published the results of an experiment on anaesthesia which purported to point to a role of quantum processes in consciousness; here is a popular exposition:
https://neurosciencenews.com/quantum-process-consciousness-27624/
As my expertise in neuroscience doesn't reach up to an ant's ear...
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