Dynamically Driven Irreversibility in Many Body Quantum Systems: An experimental approach
| dc.creator | Usaj, Gonzalo | |
| dc.creator | Pastawski, Horacio M. | |
| dc.creator | Levstein, Patricia R. | |
| dc.date | 1998-03-03 | |
| dc.date.accessioned | 2026-07-07T03:10:04Z | |
| dc.date.available | 2026-07-07T03:10:04Z | |
| dc.description | The NMR technique allows one to create a non-equilibrium local polarization and to detect its later evolution. By a change of the sign of the effective dipolar Hamiltonian, the apparently diffusive dynamics is reverted, generating a polarization echo (PE). This echo attenuates as a function of the time $t_R$ elapsed until the dynamics is reverted. We report a set of experiments where we slow down the dipolar dynamics showing that it controls this irreversibility. In cobaltocene, a cross over from Gaussian to exponential PE attenuation is found; in ferrocene the exponential regime is not reached. We conclude that many-body quantum systems have intrinsic instabilities, which amplify the environment fluctuations and hinder their backward evolution. | |
| dc.description | RevTeX, 4 pages, 4 Postscript figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9803047 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9803047 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/28130 | |
| dc.subject | Condensed Matter | |
| dc.title | Dynamically Driven Irreversibility in Many Body Quantum Systems: An experimental approach | |
| dc.type | text |