Generalized local-frame-transformation theory for excited species in external fields
- Purdue University, West Lafayette, IN (United States)
A rigorous theoretical framework is developed for a generalized local-frame-transformation theory (GLFT). The GLFT is applicable to the following systems: Rydberg atoms or molecules in an electric field and negative ions in any combination of electric and/or magnetic fields. A first test application to the photoionization spectra of Rydberg atoms in an external electric field demonstrates dramatic improvement over the first version of the local- frame-transformation theory developed initially by U. Fano [Phys. Rev. A 24, 619 (1981)] and D. A. Harmin [Phys. Rev. A 26, 2656 (1982)]. This revised GLFT theory yields nontrivial corrections because it now includes the full on-shell Hilbert space without adopting the truncations in the original theory. Comparisons of the semianalytical GLFT Stark spectra with ab initio numerical simulations yield errors in the range of a few tens of MHz, an improvement over the original Fano-Harmin theory, whose errors are 10–100 times larger. Furthermore, our analysis provides a systematic pathway to precisely describe the corresponding photoabsorption spectra that should be accurate enough to meet most modern experimental standards.
- Research Organization:
- Purdue University, West Lafayette, IN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- Grant/Contract Number:
- SC0012193; SC0010545
- OSTI ID:
- 2569790
- Alternate ID(s):
- OSTI ID: 1266408
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 1 Vol. 94; ISSN 2469-9926; ISSN 2469-9934
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Comment on “Test of the Stark-effect theory using photoionization microscopy”
Electric field effects on barium autoionizing spectra