 Magnetic flux quantum

The magnetic flux quantum, often denoted as \(\Phi_0\), is a fundamental constant in quantum physics that describes the smallest possible unit of magnetic flux that can exist in a superconductor. It is particularly important in the context of superconductivity and quantum mechanics. The magnetic flux quantum is defined as: \[ \Phi_0 = \frac{h}{2e} \] where: - \(h\) is Planck's constant (approximately \(6.

TODO is there any relationship between this and the Josephson effect?

Experimental observation published as Experimental Evidence for Quantized Flux in Superconducting Cylinders.

This appears to happen to any superconducting loop, because the superconducting wave function has to be continuous.

Video "Superconducting Qubit by NTT SCL (2015)" suggests that anything in between gets cancelled out by a superposition of current in both directions.