“To start, we will consider a single particle moving in three space dimensions under the influence of a general central potential. Later we will specialize to the case of a Coulomb potential, and work out the spectrum of hydrogen. One other classic problem, the harmonic oscillator, will be treated at the end of this chapter.”

Source: Lectures on Quantum Mechanics (2012, 2nd ed. 2015), Ch. 2: Particle States in a Central Potential

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Steven Weinberg 46
American theoretical physicist 1933

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