spininsensitivity
Spininsensitivity is a term used to describe situations in physics where a measured quantity is effectively independent of the spin state or orientation of the involved particles. In practice, an observable is spininsensitive if its expectation value does not change with spin projection, or if the experimental signal corresponds to an average over spin states that is insensitive to their specific distribution.
The phenomenon can arise from symmetries that make the interaction isotropic in spin space, from rapid spin
In practice, spininsensitive conditions appear in spectroscopy with unpolarized illumination, in electronic transport when spin relaxation
Implications include simplifying data analysis and potentially reducing spin-related noise, at the cost of losing spin
See also: spin-rotation symmetry, spin degeneracy, spin noise, spin filtering, spintronics. Note: the term is not