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The solution to the Schrödinger equation, the wavefunction, describes the quantum mechanical properties of a particle on microscopic scales. Measurable quantities such as position, momentum and energy are all derived from the wavefunction. where is the reduced Planck constant, is the mass of the particle, is the imaginary unit and is time. One peculiar potential that can be solved exactly is when the electric quadrupole moment is the dominant term of an infinitely long cylinder of charge. (SI units) (SI units)

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  • Quantum cylindrical quadrupole (en)
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  • The solution to the Schrödinger equation, the wavefunction, describes the quantum mechanical properties of a particle on microscopic scales. Measurable quantities such as position, momentum and energy are all derived from the wavefunction. where is the reduced Planck constant, is the mass of the particle, is the imaginary unit and is time. One peculiar potential that can be solved exactly is when the electric quadrupole moment is the dominant term of an infinitely long cylinder of charge. (SI units) (SI units) (en)
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  • The solution to the Schrödinger equation, the wavefunction, describes the quantum mechanical properties of a particle on microscopic scales. Measurable quantities such as position, momentum and energy are all derived from the wavefunction. where is the reduced Planck constant, is the mass of the particle, is the imaginary unit and is time. One peculiar potential that can be solved exactly is when the electric quadrupole moment is the dominant term of an infinitely long cylinder of charge. It can be shown that the Schrödinger equation is solvable for a cylindrically symmetric electric quadrupole, thus indicating that the quadrupole term of an infinitely long cylinder can be quantized.In the physics of classical electrodynamics, it can be easily shown that the scalar potential and associated mechanical potential energy of a cylindrically symmetric quadrupole is as follows: (SI units) (SI units) Cylindrical symmetry should be used when solving the equation. The time independent Schrödinger equation becomes the following in cylindrical symmetry. Using the technique Separation of Variables, the above equation can be written as two ordinary differential equations in both the radial and azimuthal directions. The radial equation is Bessel's equation as can be seen below. If one changes variables to , Bessel's equation is exactly obtained. (en)
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