Time evolution, cyclic solutions and geometric phases for general spin in an arbitrarily varying magnetic field

Invariant Hermitian operator and geometr

Invariant Hermitian operator and geometric phase for the Heisenberg spin system in a time-dependent magnetic field

✍ Fengli Yan; Linguang Yang; Bozang Li 📂 Article 📅 1999 🏛 Elsevier Science 🌐 English ⚖ 54 KB

An invariant Hermitian operator is constructed for the Heisenberg spin system in a time-dependent magnetic field. Using it we obtain the general solution of the Schrodinger equation for this system. By virtue of the general solution, the geometric phase of Pancharatnam type is worked out.