Bloch–Siegert shift
= Bloch–Siegert shift
{wiki=Bloch–Siegert_shift}
The Bloch–Siegert shift refers to a phenomenon in quantum mechanics that occurs in the context of magnetic resonance, particularly in the study of spins in a magnetic field. It describes a shift in the resonance frequency of a quantum system, such as nuclear spins in a magnetic field, when subjected to a strong radiofrequency (RF) field.