An exactly solvable dead-layer problem

Details An exactly solvable dead-layer problem An exactly solvable dead-layer problem

2011-03-05

arxiv.org/abs/1103.1029v1

Molecular Physics, 109: 4, 551 - 558 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages, 4 figures

Scientific paper

A molecule consisting of two particles interacting with a delta-function attraction, and confined to a one-dimensional volume, is studied. From the exact solution of the system we deduce that the center-of-mass effectively moves in a volume reduced by an inaccessible dead layer near each wall. For a very large volume the dead-layer width equals the size of the molecule, defined as the expectation value of the interparticle distance for the unconfined molecule. For finite volumes the dead-layer width is smaller than this. For unequal particle masses, perturbation in the mass difference up to third order yields the same result, and we conjecture that for this system the dead-layer width is independent of the mass values.

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