Title

Virtual Resonant Emission and Oscillatory Long-Range Tails in Van Der Waals Interactions of Excited States: QEDTreatment and Applications

Abstract

We report on a quantum electrodynamic (QED) investigation of the interaction between a ground state atom with another atom in an excited state. General expressions, applicable to any atom, are indicated for the long-range tails that are due to virtual resonant emission and absorption into and from vacuum modes whose frequency equals the transition frequency to available lower-lying atomic states. For identical atoms, one of which is in an excited state, we also discuss the mixing term that depends on the symmetry of the two-atom wave function (these evolve into either the gerade or the ungerade state for close approach), and we include all nonresonant states in our rigorous QED treatment. In order to illustrate the findings, we analyze the fine-structure resolved van der Waals interaction for nD-1S hydrogen interactions with n=8, 10, 12 and find surprisingly large numerical coefficients.

Department(s)

Physics

Keywords and Phrases

Atoms; Electrodynamics; Ground State; Quantum Electronics; Quantum Theory; Van Der Waals Forces; Wave Functions; Excited States; Atom Wave Function; Ground-state Atoms; Hydrogen Interaction; Numerical Coefficients; Quantum Electrodynamics; Resonant Emissions; Transition Frequencies; Van Der Waals Interactions

International Standard Serial Number (ISSN)

0031-9007

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2017 American Physical Society (APS), All rights reserved.


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