The quantum state manipulation of dipole atoms is extremely difficult. To solve this problem, Liu Hongping, a researcher at the Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, and Professor You Li from the Department of Physics of Tsinghua University have conducted collaborative research and proposed a dynamic method to preserve atomic induction using symmetry breaking. Electric dipole moment scheme.
Normally, the quantum state still follows the adiabatic evolution law during the manipulation of the external field of the atom, which is not conducive to the dipole dynamic manipulation between atoms. If the atom in the electric field is further applied with a vertical magnetic field, the original symmetry of the atom will be Destroyed, the degree of anti-crossing of the atom is also significantly weakened, allowing the atom to still tunnel from a dipole state to a quantum state with the same dipole polarity during the slower external field manipulation time. The dipolar polarity of the atoms is kept unchanged before and after the regulation.
Based on the good cross-field experimental platform in Wuhan, the research team experimentally observed the nonlinear Landau-Kener tunneling effect of this symmetry-breaking enhancement. The symmetry-breaking resulted in an algebraic space drama describing atoms. Zeng, the research team proposed a localized dynamics research method and reproduced the kinetic physics image and experimental process very well. This research result was recently published in “Physical Review Letters”, a top academic journal of physics in the world. .