"Version: 20210201"--Title page verso.

Includes bibliographical references.

1. Introduction -- 2. Two flavors of hydrogen atoms : a possible explanation of dark matter -- 2.1. The mystery and its resolution through a fundamental discovery -- 2.2. An alternative kind of hydrogen atom as a possible explanation of the latest puzzling observation of the 21 cm radio line from the early Universe -- 2.3. Two flavors of hydrogen atoms

3. Monopole contribution to the Stark width of hydrogen-like spectral lines in plasmas -- 4. How the finite mass of nuclei complicates analytical treatments of hydrogen atoms in external fields -- 4.1. Hydrogen atoms in a magnetic field -- 4.2. Hydrogen atoms in an electric field

5. Ionization of hydrogen atoms by a low-frequency laser field of arbitrary strength : no 'local suppression' -- 6. Generalized dynamics of a spherical harmonic oscillator -- 7. Selected applications for spectroscopic diagnostics of plasmas -- 7.1. Quasienergy states as a tool for diagnosing quasimonochromatic electric fields in plasmas -- 7.2. Measuring the laser field and the opacity of spectral lines in plasmas -- 7.3. Profiles of hydrogenic spectral lines under the multimode quasimonochromatic field of the electrostatic plasma turbulence

8. Enhancement of plasma-based x-ray lasers -- 9. Enhancement of generators of coherent microwave radiation (masers) -- 9.1. Introduction -- 9.2. Density matrix and polarization of the medium -- 9.3. Amplification of a microwave or infra-red radiation by the stimulated scattering in a dipole gas -- 9.4. Extension of lasing media and lasing schemes -- 9.5. Consecutive cells set-up -- 9.6. Summary and list of prospective lasing media

10. A no-dark-energy and no-modified-gravity explanation of the dynamics of the expansion of the Universe -- 10.1. Description of the scenario -- 10.2. Conclusions.

Simple atoms are atoms consisting of no more than three particles. They are the test-bench of atomic physics and quantum mechanics. This book presents these findings, bridging the gap between textbook descriptions of these systems and the latest research. Counterintuitive phenomena in simple atomic and molecular systems are revealed, along with their fundamental importance and practical applications. These include the advanced methods for lasing in the infra-red and microwave ranges, the improved design of x-ray lasers, and advanced methods for spectroscopic diagnostics of plasmas. The analytical solutions of simple atoms and their role in theoretical physics will also be discussed. The book is aimed at graduate students and researchers in the field of atomic and molecular physics.

Graduate students and researchers.

Also available in print.

Mode of access: World Wide Web.

System requirements: Adobe Acrobat Reader, EPUB reader, or Kindle reader.

Eugene Oks has founded and developed new research fields such as intra-Stark spectroscopy (a new class of nonlinear optical phenomena in plasmas), masing without inversion (advanced schemes for generating/amplifying coherent microwave radiation), and quantum chaos (nonlinear dynamics in the microscopic world). He is the Chief Editor of the journal International Review of Atomic and Molecular Physics and has published approximately 500 papers as well as eight previous books.

Title from PDF title page (viewed on March 17, 2021).