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虚弱骨に対するカルシウム食療法に関する X 線的, 光顕的および超微形態的研究 : 下顎頭の変化
| Content Provider | Semantic Scholar |
|---|---|
| Author | 矢野目, 鎮照 |
| Copyright Year | 1994 |
| Abstract | Motivated by work of Jaynes and co-workers, the very old problem of atomic level shifts and level widths has begun to be re-examined recently. We have re-considered the question of level shifts and widths in spontaneous emission by a single twolevel atom. Our approach is not the customary one, although it is fully quantum electrodynamic. We show that if one follows the JaynesCrisp-Stroud line of argument and approximations, but integrates the relevant quantum electrodynamic equations instead of their semiclassical equations, one finds the following results: (1) Our predicted level width agrees with the semiclassical level width in the way that Jaynes has emphasized. (2) The level shift calculated by Jaynes and Crisp (called a Lamb shift by them) is reproduced exactly, when their same approximations are made. (3) Th ere is, however, no frequency modulation of the emitted light. That is, the level shift is static, not a dynamic function of time. It is interesting that the approach to semiclassical atomic radiation theory so long advocated by Jaynes, the direct selfconsistent integration of dynamical equations over long times as opposed to perturbation analysis, is relatively easily taken over to quantum electrodynamics in this simple problem. We will comment on the results described above and contrast them with the results of a more careful quantum electrodynamic analysis. |
| Starting Page | 668 |
| Ending Page | 686 |
| Page Count | 19 |
| File Format | PDF HTM / HTML |
| DOI | 10.11501/3082317 |
| Alternate Webpage(s) | http://www.slac.stanford.edu/pubs/slacpubs/1000/slac-pub-1066.pdf |
| Alternate Webpage(s) | https://doi.org/10.11501/3082317 |
| Volume Number | 48 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
