Interaction-Induced Chiral Quantum States of the Ultracold Polar Molecules

The ultracold polar molecules with the tunable dipole-dipole interaction, not only would enable explorations of a large class of exotic many-body physics phenomena, but also could be used for quantum information processing. In the present paper we demonstrate that this dipole-dipole interaction can...

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Bibliographic Details
Published in:理论物理通讯：英文版 2012, Vol.58 (11), p.754-758
Main Author: WANG Ming-Hao LIANG Jiu-Qing MA Jie CHEN Gang JIA Suo-Tang
Format: Article
Language:English
Subjects:
偶极相互作用
手性
极性分子
诱导
超冷分子
量子信息处理
量子态
非简并态
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Summary:The ultracold polar molecules with the tunable dipole-dipole interaction, not only would enable explorations of a large class of exotic many-body physics phenomena, but also could be used for quantum information processing. In the present paper we demonstrate that this dipole-dipole interaction can generate the degenerate chiral quantum states acting as a qubit robust against noise when the ultracold polar molecules are confined by a triangular lattice. Moreover, we also find two first-order quantum phase transitions by controlling an external driving t~eld. One is the transition with the change of the different degenerate chiral quantum states. The other is the transition with the breaking of the degenerate quantum chirAL states to the nondegenerate state. In experiment, these first-order quantum phase transitions can be detected by measuring the collective molecular population.
ISSN:0253-6102