I've found that the momentum expectation of a particle inside an one dimensional finite box of length 'L' is '0'... we can say the probability of going right=that of the left... so sum up to zero. Now I calculate the same(<p>) for a free particle in one dimension if I think that free particle is not exactly free but kept inside an infinitely long box(L-->infinity)... the result should be the same... does that happen.... does it make any sense to draw analogy between the two.... ?? please help.(adsbygoogle = window.adsbygoogle || []).push({});

atanu

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# Should we think a free particle as a particle in an infinitely big box?

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