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Atomic Nuclei: Nuclear Relaxation Processes01:23

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Deactivation Processes: Jablonski Diagram01:25

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Gradient Echo Quantum Memory in Warm Atomic Vapor
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Relajación y pretermalización en un sistema cuántico aislado.

M Gring1, M Kuhnert, T Langen

  • 1Vienna Center for Quantum Science and Technology, Atominstitut, Technische Universität Wien, Stadionallee 2, 1020 Vienna, Austria.

Science (New York, N.Y.)
|September 8, 2012
PubMed
Resumen

Los investigadores estudiaron la dinámica de relajación en los gases de Bose utilizando la interferencia cuántica. Observaron un estado estacionario similar al térmico, lo que sugiere un proceso de pretermalización independiente de las condiciones iniciales.

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Área de la Ciencia:

  • La física cuántica es la física cuántica.
  • La mecánica estadística es la mecánica estadística.
  • Física de la materia condensada Física de la materia condensada Física de la materia condensada Física de la materia condensada Física de la materia condensada

Sus antecedentes:

  • Los procesos de relajación son cruciales en la física, pero son difíciles de estudiar experimentalmente.
  • La caracterización de estados transitorios complejos requiere técnicas experimentales avanzadas.

Objetivo del estudio:

  • Para investigar la dinámica de relajación de un gas unidimensional de Bose coherentemente dividido.
  • Desarrollar y aplicar nuevas herramientas experimentales para sondear sistemas cuánticos.

Principales métodos:

  • Mediciones utilizadas de distribuciones de probabilidad mecánicas cuánticas completas.
  • Empleó técnicas de interferencia de ondas de materia.
  • Estudió un gas Bose unidimensional coherentemente dividido.

Principales resultados:

  • Obtuvo información completa sobre los estados dinámicos del sistema.
  • Se observó una rápida evolución inicial seguida de un estado estacionario.
  • El estado estacionario exhibió una temperatura efectiva independiente de la temperatura de equilibrio inicial.

Conclusiones:

  • El estado estacionario observado puede ser descrito por un conjunto generalizado de Gibbs.
  • El fenómeno está asociado con la pretermalización.
  • Este trabajo proporciona nuevos conocimientos sobre la dinámica de relajación en sistemas cuánticos.