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02 July 2020
  » arxiv » cond-mat/0107342

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Interaction induced localization in a gas of pyramidal molecules
Giovanni Jona-Lasinio ; Carlo Presilla ; Cristina Toninelli ;
Date 16 Jul 2001
Journal Phys.Rev.Lett. 88 (2002) 123001
Subject Condensed Matter; Atomic Physics | cond-mat hep-th physics.atom-ph quant-ph
AbstractWe propose a model to describe a gas of pyramidal molecules interacting via dipole-dipole interactions. The interaction modifies the tunneling properties between the classical equilibrium configurations of the single molecule and, for sufficiently high pressure, the molecules become localized in these classical configurations. We explain quantitatively, without free parameters, the shift to zero frequency of the inversion line observed upon increase of the pressure in a gas of ammonia or deuterated ammonia. For sufficiently high pressures, our model suggests the existence of a superselection rule for states of different chirality in substituted derivatives.
Source arXiv, cond-mat/0107342
Other source [GID 789437] pmid11909453
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