A nuclear magnetic resonance answer to the Boltzmann–Loschmidt controversy?

H.m Pastawski, P.r Levstein, G Usaj, J Raya and J Hirschinger

Physica A: Statistical Mechanics and its Applications, 2000, vol. 283, issue 1, 166-170

Abstract: A unique experimental tool to deepen into the Boltzmann–Loschmidt controversy is provided by the NMR polarization echoes (PE). These appear when a local spin excitation, evolving with a many-body “diffusive” spin dynamics, is reversed. The attenuation of the PEs represents a progresive failure of the quantum interferences to rebuild the local excitation. Our results indicate that, in the absence of detectable environmental interactions, the characteristic time of this attenuation is determined by the reversible dynamics itself, i.e., spin–spin interaction time. This supports the Boltzmann's hypothesis of molecular “chaos”.

Keywords: Nuclear magnetic resonance; Mesoscopic systems (search for similar items in EconPapers)
Date: 2000
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:283:y:2000:i:1:p:166-170

DOI: 10.1016/S0378-4371(00)00146-1

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