Results 251 to 260 of about 1,072,800 (324)
The Journal of Chemical Physics, 1949 Formulas are given for an approximation to the energy values of the levels of the asymmetric rotor when the latter are essentially twofold degenerate. The method of arriving at these formulas follows that described recently, in which the energy matrix is examined under conditions where J→∞.
Sidney Golden, J. K. Bragg
semanticscholar +3 more sources
Quantum Electronics, 2018 This paper presents an analytical study of the formation of normal modes of probe light for electromagnetically induced transparency in a lambda system of quantum transitions between 3P0, and 3P2 levels in the case of an elliptically polarised control ...
О М Паршков
semanticscholar +3 more sources
Energy Levels of Direct Excitons in Semiconductors with Degenerate Bands
Physical Review B, 1971 A. Baldereschi, Nunzio C. Lipari
semanticscholar +3 more sources
Effective disappearance of degenerating energy levels
Physical Review A, 1995 Inverse spectral theory provides a theorem on the shifting of a single level, leaving all others unchanged, in a quantum-mechanical system over a finite range in one dimension. We show that the mechanism can be used to remove a pair of states from the spectrum by shifting the energy of one state onto that of a neighboring state. We extend the procedure
V. M. Chabanov +4 more
openalex +3 more sources
ACS Applied Materials & Interfaces, 2021 Two-dimensional organic-inorganic lead halide perovskites are generating great interest due to their optoelectronic characteristics such as high solar energy conversion efficiency and a tunable direct band gap in the visible regime. However, the presence of defect states within the two-dimensional crystal structure can affect these properties ...
Brian Ko +7 more
openalex +3 more sources
Physical Review E, 2001 The behavior of quantum states and observables of a quasi-integrable quantum system is studied. Sensitivity of the quantum states and nonperiodicity of the average value of observables at the degenerate points of energy levels are observed. The behavior demonstrates the quantum properties corresponding to the classical resonant tori with rational ...
Yingxin Jin, Kaifen He
openalex +3 more sources
Zero-field Energy Levels in Near-doubly-degenerate Triplet States
Bulletin of the Chemical Society of Japan, 1982 Abstract The zero-field energy levels in neardoubly-degenerate triplet states are discussed on molecules which are distorted so as to lose their trigonal symmetry axes. As an example, the second excited triplet states of a deformed benzene molecule are calculated from the electron spin-spin interactions.
Jiro Higuchi
openalex +2 more sources
Canadian Journal of Physics, 1971 Formulas are developed to describe the rotational energy of a linear polyatomic molecule in a 2Σ or 3Σ electronic state, where one or more quanta of a degenerate bending vibration are excited. In 2Σ states the spin doubling and l-type doubling are independent, provided that the rotational constant B is large compared with the spin–rotation interaction
A. J. Merer, J. M. Allegretti
openalex +2 more sources
Journal of Chemical Education, 2012 Teaching the Jahn-Teller theorem offers several challenges. For many students, the first encounter comes in coordination chemistry, which can be difficult due to the already complicated nature of transition-metal complexes. Moreover, a deep understanding of the Jahn-Teller theorem requires that one is well acquainted with quantum mechanics and group ...
Adam Johannes Johansson
openalex +2 more sources