Quantum Anomaly in Molecular Physics

Details Quantum Anomaly in Molecular Physics Quantum Anomaly in Molecular Physics

2001-06-16

arxiv.org/abs/hep-th/0106144v2

Phys.Rev.Lett. 87 (2001) 220402

Physics

High Energy Physics

High Energy Physics - Theory

4 pages

Scientific paper

10.1103/PhysRevLett.87.220402

The interaction of an electron with a polar molecule is shown to be the simplest realization of a quantum anomaly in a physical system. The existence of a critical dipole moment for electron capture and formation of anions, which has been confirmed experimentally and numerically, is derived. This phenomenon is a manifestation of the anomaly associated with quantum symmetry breaking of the classical scale invariance exhibited by the point-dipole interaction. Finally, analysis of symmetry breaking for this system is implemented within two different models: point dipole subject to an anomaly and finite dipole subject to explicit symmetry breaking.

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