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  T1 and T2 time example in NMR and spontaneous emission

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How is the T1 and T2 time in NMR related to T1 and T2 time in spontaneous emission? Also, in quantum dephasing, does T1 not exist while only T2 exists?

  • In NMR T2, it is said that it corresponds to a decoherence of the transverse nuclear spin magnetization. What is its correspondence in spontaneous emission?
  • This notes p.8 also imply T2 relaxation does not affect the total amount of z-magnetization, but the degree of synchronization of the transverse magnetization components. If only quantum dephasing happens, no x y component of local field (no energy transfer), does this mean that only T2 exist?

Ref: https://www.ucl.ac.uk/nmr/NMR_lecture_notes/L5_3SH_web_shortened.pdf

asked Jun 28, 2016 in Theoretical Physics by phi (20 points) [ revision history ]
retagged Jun 28, 2016 by phi

please add context by giving a relevant reference

commented Jun 28, 2016 by Arnold Neumaier (15,787 points) [ no revision ]

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