Interaction induced localization in a gas of pyramidal molecules
Interaction induced localization in a gas of pyramidal molecules
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DOI：
10.1103/physrevlett.88.123001
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发表时间：
2002-03-25
影响因子：
8.6
通讯作者：
Toninelli, C
中科院分区：
文献类型：
--
作者：
Jona-Lasinio, G;Presilla, C;Toninelli, C
我们提出了一个模型来描述通过偶极 - 偶极相互作用相互作用的金字塔分子气体。该相互作用修改了单分子的经典平衡构型之间的隧道特性，并且为了足够高压，分子在这些经典构型中定位。我们定量解释，没有自由参数，在氨或剥离氨气中压力增加后观察到的反转线的零频率的变化。对于足够高的压力，我们的模型表明，在替代衍生物中有不同手性的状态存在超选择规则。
We 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.