When is the lowest order WKB quantization exact?

2006 ◽  
Vol 84 (6-7) ◽  
pp. 573-581 ◽  
Author(s):  
R K Bhaduri ◽  
D W.L. Sprung ◽  
A Suzuki
Keyword(s):  
Quantum Mechanics ◽  
Periodic Orbit ◽  
Density Of States ◽  
Maslov Index ◽  
Supersymmetric Quantum Mechanics ◽  
Exact Results ◽  
Quantization Rule ◽  
Classical Action ◽  
Shape Invariant ◽  
03.65 Sq

First, two conditions are specified for the lowest order Wentzel–Kramers–Brillouin quantization rule to yield exact results. These rules are related to the periodic orbit decomposition of the quantum density of states. This approach is then applied to supersymmetric quantum mechanics. It leads to a new derivation of the result that shape-invariant potentials give exact results when the classical action is calculated with the square of the super potential, but without the Maslov index or the Langer correction.PACS Nos.: 03.65.Sq, 12.60.Jv

scholarly journals Deformed Shape Invariant Superpotentials in Quantum Mechanics and Expansions in Powers of ℏ

Symmetry ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 1853
Author(s):  
Christiane Quesne
Keyword(s):  
Differential Equation ◽  
Quantum Mechanics ◽  
Partial Differential Equations ◽  
Differential Equations ◽  
Supersymmetric Quantum Mechanics ◽  
Invariance Condition ◽  
Partial Differential ◽  
Shape Invariance ◽  
Shape Invariant ◽  
Infinite Set

We show that the method developed by Gangopadhyaya, Mallow, and their coworkers to deal with (translational) shape invariant potentials in supersymmetric quantum mechanics and consisting in replacing the shape invariance condition, which is a difference-differential equation, which, by an infinite set of partial differential equations, can be generalized to deformed shape invariant potentials in deformed supersymmetric quantum mechanics. The extended method is illustrated by several examples, corresponding both to ℏ-independent superpotentials and to a superpotential explicitly depending on ℏ.

GENERATING SHAPE INVARIANT POTENTIALS

2008 ◽  
Vol 23 (31) ◽  
pp. 4959-4978 ◽  
Author(s):  
ASIM GANGOPADHYAYA ◽  
JEFFRY V. MALLOW
Keyword(s):  
Differential Equation ◽  
Partial Differential Equation ◽  
Quantum Mechanics ◽  
Supersymmetric Quantum Mechanics ◽  
New Method ◽  
Invariance Condition ◽  
Partial Differential ◽  
Shape Invariance ◽  
Shape Invariant

We transform the shape invariance condition, a difference-differential equation of supersymmetric quantum mechanics, into a local partial differential equation. We develop a new method for generating translationally shape invariant potentials from this equation. We generate precisely all the known shape invariant potentials, and argue that there are unlikely to be others.

scholarly journals Shape invariant potentials in SUSY quantum mechanics and periodic orbit theory

2005 ◽  
Vol 38 (11) ◽  
pp. L183-L189 ◽  
Author(s):  
Rajat K Bhaduri ◽  
Jamal Sakhr ◽  
D W L Sprung ◽  
Ranabir Dutt ◽  
Akira Suzuki
Keyword(s):  
Quantum Mechanics ◽  
Periodic Orbit ◽  
Periodic Orbit Theory ◽  
Shape Invariant ◽  
Orbit Theory

scholarly journals INDUCED VARIATIONAL METHOD FROM SUPERSYMMETRIC QUANTUM MECHANICS AND THE SCREENED COULOMB POTENTIAL

2000 ◽  
Vol 15 (19) ◽  
pp. 1253-1259 ◽  
Author(s):  
ELSO DRIGO FILHO ◽  
REGINA MARIA RICOTTA
Keyword(s):  
Wave Function ◽  
Quantum Mechanics ◽  
Variational Method ◽  
Coulomb Potential ◽  
Trial Wave Function ◽  
Supersymmetric Quantum Mechanics ◽  
Exact Results ◽  
Energy Eigenvalues ◽  
Screened Coulomb Potential

The formalism of supersymmetric quantum mechanics supplies a trial wave function to be used in the variational method. The screened Coulomb potential is analyzed within this approach. Numerical and exact results for energy eigenvalues are compared.

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