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20 September 2020
 
  » pubmed » pmid11909453

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Interaction induced localization in a gas of pyramidal molecules
Giovanni Jona-Lasinio ; Carlo Presilla ; Cristina Toninelli ;
Date 25 Mar 2002
Journal Phys Rev Lett, 88 (12), 123001
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 super-selection rule for states of different chirality in substituted derivatives.
Source PubMed, pmid11909453
Other source [GID 789437] cond-mat/0107342
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