Environment induced localization and superselection rules in a gas of pyramidal molecules

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dc.creatorJona-Lasinio, Giovanni
dc.creatorPresilla, Carlo
dc.creatorToninelli, Cristina
dc.date2001-07-16
dc.date.accessioned2026-07-25T14:27:06Z
dc.descriptionWe propose a model to describe a gas of pyramidal molecules interacting via dipole-dipole interactions. A cooperative effect induced by the interaction modifies the tunneling properties between the classical equilibrium configurations of the single molecule. The model suggests that, for sufficiently high gas density, the molecules become localized in these classical configurations. On this basis it is possible to explain the shift and the disappearance of the inversion line observed upon increase of the pressure in a gas of ammonia or deuterated ammonia. The same mechanism also accounts for the presence of stable optical activity of certain pyramidal molecules. We discuss the concept of environment induced superselection rule which has been invoked in connection with this problem.
dc.description10 pages, 1 figure
dc.identifierhttps://arxiv.org/abs/cond-mat/0107341
dc.identifierhttp://arxiv.org/abs/cond-mat/0107341
dc.identifierFields Inst.Commun. 30 (2001) 207-217
dc.identifier.urihttps://dspace.dare.co.zw/handle/123456789/25765
dc.subjectCondensed Matter
dc.subjectHigh Energy Physics - Theory
dc.subjectAtomic Physics
dc.subjectQuantum Physics
dc.titleEnvironment induced localization and superselection rules in a gas of pyramidal molecules
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