Position Operator - Introduction

Introduction

In quantum mechanics, the wavefunction of a particle moving in one dimension represents the probability density of finding the particle at . Hence the expectation value of a measurement of the position of the particle is

Accordingly, the quantum mechanical operator corresponding to position is, where

Read more about this topic:  Position Operator

Famous quotes containing the word introduction:

    For the introduction of a new kind of music must be shunned as imperiling the whole state; since styles of music are never disturbed without affecting the most important political institutions.
    Plato (c. 427–347 B.C.)

    The role of the stepmother is the most difficult of all, because you can’t ever just be. You’re constantly being tested—by the children, the neighbors, your husband, the relatives, old friends who knew the children’s parents in their first marriage, and by yourself.
    —Anonymous Stepparent. Making It as a Stepparent, by Claire Berman, introduction (1980, repr. 1986)

    We used chamber-pots a good deal.... My mother ... loved to repeat: “When did the queen reign over China?” This whimsical and harmless scatological pun was my first introduction to the wonderful world of verbal transformations, and also a first perception that a joke need not be funny to give pleasure.
    Angela Carter (1940–1992)