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In quantum mechanics, the position operator is the operator that corresponds to the position observable of a particle. The eigenvalue of the operator is the position vector of the particle. ==Introduction== In one dimension, the square modulus of the wave function, , represents the probability density of finding the particle at position . Hence the expected value of a measurement of the position of the particle is : Accordingly, the quantum mechanical operator corresponding to position is , where : The circumflex over the x on the left side indicates an operator, so that this equation may be read ''The result of the operator x acting on any function ψ(x) equals x multiplied by ψ(x).'' Or more simply, ''the operator x multiplies any function ψ(x) by x.'' 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「position operator」の詳細全文を読む スポンサード リンク
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