1. A Perturbative Approach to the Tunneling Phenomena
- Author
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Osman Teoman Turgut, Fatih Erman, Erman, Fatih, and Izmir Institute of Technology. Mathematics
- Subjects
Instanton ,Dirac delta potentials ,Tunneling ,Materials Science (miscellaneous) ,Biophysics ,Dirac delta function ,General Physics and Astronomy ,FOS: Physical sciences ,resolvent ,Perturbation theory ,01 natural sciences ,WKB approximation ,Theoretical physics ,symbols.namesake ,tunneling ,0103 physical sciences ,Bound state ,Physical and Theoretical Chemistry ,Resolvent ,010306 general physics ,Heat kernel ,Quantum tunnelling ,Mathematical Physics ,perturbation theory ,Physics ,Quantum Physics ,Mathematical Physics (math-ph) ,lcsh:QC1-999 ,Bound state energy ,Krein's formulae ,symbols ,Perturbation theory (quantum mechanics) ,Dirac delta potentials supported by curves ,Quantum Physics (quant-ph) ,lcsh:Physics - Abstract
The double-well potential is a good example, where we can compute the splitting in the bound state energy of the system due to the tunneling effect with various methods, namely WKB or instanton calculations. All these methods are non-perturbative and there is a common belief that it is difficult to find the splitting in the energy due to the barrier penetration from a perturbative analysis. However, we will illustrate by explicit examples containing singular potentials (e.g., Dirac delta potentials supported by points and curves and their relativistic extensions)that it is possible to find the splitting in the bound state energies by developing some kind of perturbation method., Comment: 24 pages, 4 figures
- Published
- 2019
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