INVESTIGADORES
PASTAWSKI Horacio Miguel
artículos
Título:
Quantum Dynamical Echoes in the Spin Diffusion in Mesoscopic Systems
Autor/es:
HORACIO M. PASTAWSKI; PATRICIA R. LEVSTEIN; GONZALO USAJ
Revista:
PHYSICAL REVIEW LETTERS
Editorial:
American Physical Society
Referencias:
Lugar: Ridge N.Y.; Año: 1995 vol. 75 p. 4310 - 4313
ISSN:
0031-9007
Resumen:
The evolution of local spin polarization in finite systems involves interference phenomena that give
rise to quantum dynamical echoes and nonergodic behavior. We predict the conditions to observe these
echoes by exploiting the NMR sequences devised by Zhang et al. [Phys. Rev. Lett. 69, 2149 (1992)],
which uses a rare 13C as the local probe for a dipolar coupled 1H spin system. The nonideality of this
probe when testing mesoscopic systems is carefully analyzed revealing the origin of various striking
experimental features.quantum dynamical echoes and nonergodic behavior. We predict the conditions to observe these
echoes by exploiting the NMR sequences devised by Zhang et al. [Phys. Rev. Lett. 69, 2149 (1992)],
which uses a rare 13C as the local probe for a dipolar coupled 1H spin system. The nonideality of this
probe when testing mesoscopic systems is carefully analyzed revealing the origin of various striking
experimental features.et al. [Phys. Rev. Lett. 69, 2149 (1992)],
which uses a rare 13C as the local probe for a dipolar coupled 1H spin system. The nonideality of this
probe when testing mesoscopic systems is carefully analyzed revealing the origin of various striking
experimental features.13C as the local probe for a dipolar coupled 1H spin system. The nonideality of this
probe when testing mesoscopic systems is carefully analyzed revealing the origin of various striking
experimental features.