磁场对分子-溶剂角动量转移的影响。

Effect of a magnetic field on molecule-solvent angular momentum transfer.

机构信息

IST Austria (Institute of Science and Technology Austria), Am Campus 1, 3400 Klosterneuburg, Austria.

出版信息

J Chem Phys. 2018 Mar 14;148(10):104307. doi: 10.1063/1.5017591.

Abstract

Recently it was shown that a molecule rotating in a quantum solvent can be described in terms of the "angulon" quasiparticle [M. Lemeshko, Phys. Rev. Lett. 118, 095301 (2017)]. Here we extend the angulon theory to the case of molecules possessing an additional spin-1/2 degree of freedom and study the behavior of the system in the presence of a static magnetic field. We show that exchange of angular momentum between the molecule and the solvent can be altered by the field, even though the solvent itself is non-magnetic. In particular, we demonstrate a possibility to control resonant emission of phonons with a given angular momentum using a magnetic field.

摘要

最近有人指出，在量子溶剂中旋转的分子可以用“角子”准粒子来描述[M. Lemeshko, Phys. Rev. Lett. 118, 095301 (2017)]。在这里，我们将角子理论扩展到具有附加的自旋 1/2 自由度的分子的情况，并研究在存在静磁场时系统的行为。我们表明，即使溶剂本身没有磁性，分子和溶剂之间的角动量交换也可以被磁场改变。具体来说，我们证明了可以使用磁场来控制具有给定角动量的声子的共振发射。