The Spin-Echo System Reconsidered

Mei Bai, Alexander W. Chao, T. Roser +6 more

Robert J. Ragan

Seth Lloyd, Wojciech Hubert Zurek

D. C. Haueisen, Thomas D. Bonifield

The classical interpretation of the spin echo is reviewed, followed by a simple quantum-mechanical derivation of the general echo phenomenon for a two-state system. The photon echo is then examined, and graphs of hydrogenic wave functions for eigenstates and transitional states are shown as examples. As many as possible of the classical notions associated with the spin echo are applied to the case of photon echoes.

Erwin Louis Hahn

Masashi Yasunaga, Makoto Tsubota

Magnetic resonance, especially NMR and ESR, has been studied in magnetic materials for a long time, having been used in various fields. Spin echo is typical phenomenon in magnetic resonance. The magnetic resonance should be applied to spinor Bose-Einstein condensates (BECs). We numerically study spin echo of a spinor BEC in a gradient magnetic field by calculating the spin-1 two-dimensional Gross-Pitaevskii equations, obtaining the recovery of the signal of the spins, which is called spin echo. We will discuss the relation between the spin echo and the Stern-Gelrach separation in the system.