Title
Relaxation Of A Two-Level System: Non-Negativity Of Density Matrix And Possibility For Anomalously Long T2
Abstract
Density matrix equations for the relaxation of a two-level system are studied. Standard dogma, Γik ≥ (γi + γk)/2, about the relaxation constant for the off-diagonal (Γik) and diagonal (γi) matrix elements is verified for the case of up- and down-transitions with high rates w21 and w12. Non-negativity of the density matrix imposes much weaker limitation, Γ21 ≥ (1/2)[(w21)1/2 -(w12)1/2]2. An almost 'physical' system is suggested, which describes to a certain approximation such decrease of transverse relaxation constant Γ.
Publication Date
3-10-2002
Publication Title
Journal of Modern Optics
Volume
49
Issue
3-4
Number of Pages
503-509
Document Type
Article; Proceedings Paper
Personal Identifier
scopus
DOI Link
https://doi.org/10.1080/09500340110090792
Copyright Status
Unknown
Socpus ID
0037051304 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/0037051304
STARS Citation
Goun, A. A. and Zel'Dovich, B. Ya, "Relaxation Of A Two-Level System: Non-Negativity Of Density Matrix And Possibility For Anomalously Long T2" (2002). Scopus Export 2000s. 2609.
https://stars.library.ucf.edu/scopus2000/2609