The field intensity associated with spontaneous emission from two initially excited atoms

✍ Scribed by Zhao Haizhen; Kikuo Ujihara

• Book ID: 103870818
• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 860 KB
• Volume: 240
• Category: Article
• ISSN: 0030-4018
• DOI: 10.1016/j.optcom.2004.06.016

✦ Synopsis

In this paper, the spontaneous emission by two identical two-level atoms, separated a distance apart, both initially excited is considered. Using the method outlined by Ujihara and Dung [Phys. Rev. A 66 (2002) 05387], the analytical expression for the time dependent atomic-state amplitude is presented. On the basis of this analysis of atomic motion, the near-field intensity of two atoms spontaneous emission and its transition to the far field are investigated. Within fourth-order perturbation, the intensity has contributions from the states where a single or two photons exist. These states each result from different emission sequences that can show quantum interference. Our results are in consistency with the Ôsuper-radianceÕ feature predicted by Dicke. The spatial interference fringe at a certain time in the spontaneous emission, though numerically small, the quantum interference effect in the initially excited two-atom spontaneous emission are evidently existing.