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

Author

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  • Pastawski, H.M
  • Levstein, P.R
  • Usaj, G
  • Raya, J
  • Hirschinger, J

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”.

Suggested Citation

  • Pastawski, H.M & Levstein, P.R & Usaj, G & Raya, J & Hirschinger, J, 2000. "A nuclear magnetic resonance answer to the Boltzmann–Loschmidt controversy?," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 283(1), pages 166-170.
    • Handle: RePEc:eee:phsmap:v:283:y:2000:i:1:p:166-170
    DOI: 10.1016/S0378-4371(00)00146-1
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    Cited by:

    1. Kudo, Kazue & Nakamura, Katsuhiro, 2009. "Dynamical stability for finite quantum spin chains against a time-periodic inhomogeneous perturbation," Chaos, Solitons & Fractals, Elsevier, vol. 40(1), pages 166-171.

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