David Jeffery Griffiths, Darrell Franklin Schroeter, Introduction to Quantum Mechanics, 3rd edition (Cambridge University Press, 2018)
Part I. Theory 제1편. 이론
Chapter 2. Time-Independent Schrödinger Equation 제2장. 시간 무관 슈뢰딩거 방정식
문제(Problem) 6 및 해설(Solution)
Although the overall phase constant of the wave function is of no physical significance (it cancels out whenever you calculate a measurable quantity), the relative phase of the coefficients in Equation 2.17 does matter. For example, suppose we change the relative phase of ψ1 and ψ2 in Problem 2.5:
where φ is some constant. Find Ψ(x, t), |Ψ(x, t)|2, and ⟨x⟩, and compare your results with what you got before. Study the special cases φ = π/2 and φ = π. (For a graphical exploration of this problem see the applet in footnote 9 of this chapter.)
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