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Spectroscopy in the Presence of Geometrical Constraints: A Torsional Pendulum

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arxiv physics/0409105 v2 pith:3VCUAMJD submitted 2004-09-21 physics.ed-ph physics.optics

Spectroscopy in the Presence of Geometrical Constraints: A Torsional Pendulum

classification physics.ed-ph physics.optics
keywords pendulumsignificantspectroscopicsystemstorsionalanalyticanharmonicitycalculation
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We demonstrate that an effect other than anharmonicity can severely distort the spectroscopic signatures of quantum mechanical systems. This is done through an analytic calculation of the spectroscopic response of a simple system, a charged torsional pendulum. One may look for these effects in the optical data of real systems when for example a significant rocking component of rigid polyhedra plays a significant role in the lattice dynamics.

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