Abstract
In the framework of the deformed quantum mechanics with a minimal length, we consider the motion of a nonrelativistic particle in a homogeneous external field. We find the integral representation for the physically acceptable wave function in the position representation. Using the method of steepest descent, we obtain the asymptotic expansions of the wave function at large positive and negative arguments. We then employ the leading asymptotic expressions to derive the WKB connection formula, which proceeds from classically forbidden region to classically allowed one through a turning point. By the WKB connection formula, we prove the Bohr-Sommerfeld quantization rule up toOβ2. We also show that if the slope of the potential at a turning point is too steep, the WKB connection formula is no longer valid around the turning point. The effects of the minimal length on the classical motions are investigated using the Hamilton-Jacobi method. We also use the Bohr-Sommerfeld quantization to study statistical physics in deformed spaces with the minimal length.
Highlights
One of the predictions shared by various quantum theories of gravity is the existence of a minimal observable length
From the previous subsection, one finds that the asymptotic matching is valid as long as there exists an overlap region where 1 ≪ |ρ| ≪ α−2. Such region does not exist unless α ≪ 1, which means that the asymptotic matching fails through a sharp turning point
We considered a homogeneous field in the deformed quantum mechanics with minimal length
Summary
One of the predictions shared by various quantum theories of gravity is the existence of a minimal observable length. This fundamental minimal length scale could arise in the framework of the string theory [1,2,3]. One of the most popular models is the generalized uncertainty principle (GUP) [5, 6], derived from the modified fundamental commutation relation [X, P] = iħ (1 + βP2) , (1). For a review of the GUP, see [7] With this generalization, one can derive the generalized uncertainty principle (GUP)
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