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首页> 外文期刊>Journal of Experimental and Theoretical Physics >Interference of Instanton Trajectories during Quantum Tunneling in Small Particles of Real Antiferromagnets
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Interference of Instanton Trajectories during Quantum Tunneling in Small Particles of Real Antiferromagnets

机译：实际反铁磁体中的小粒子在量子隧穿过程中瞬子轨迹的干扰。

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摘要

For a two-sublattice antiferromagnet, the Lagrangian is constructed taking into account Berry's phase whose form is matched with the quantum-mechanical Heisenberg Hamiltonian. Tunnel effects are analyzed taking into account the crystallographic symmetry and possible types of Dzyaloshinski interaction. It is shown that, when the real magnetic symmetry and the Dzyaloshinski interaction are taken into consideration, the effects of destructive instanton interference and the suppression of macroscopic quantum tunneling may come into play. This may lead to a periodic dependence of the ground-state level splitting on the Dzyaloshinski interaction constant; the magnitude of this splitting is calculated.
机译：对于两子格反铁磁体，构造Lagrangian时要考虑到Berry相，其形式与量子力学的Heisenberg哈密顿量相匹配。分析隧道效应时要考虑晶体对称性和Dzyaloshinski相互作用的可能类型。结果表明，当考虑到真实的磁对称性和Dzyaloshinski相互作用时，破坏性瞬时子干扰和宏观量子隧穿的抑制作用可能会发挥作用。这可能会导致基态能级分裂对Dzyaloshinski相互作用常数的周期性依赖性。计算该分裂的幅度。

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