Asymmetric conductivity of the Kondo effect in cold atomic systems

• 作者: Yanting Cheng Xin Chen Ren Zhang
• 来源期刊: 物理学前沿
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: Atomic, Molecular & Optical Physics
• 页码范围: 66-72
• 页数: 7页
• 语种: 英文

摘要

Motivated by recent theoretical and experimental advances in quantum simulations using alkaline earth(AE) atoms,we put forward a proposal to detect the Kondo physics in a cold atomic system.It has been demonstrated that the intrinsic spin-exchange interaction in AE atoms can be significantly en-hanced near a confinement-induced resonance (CIR),which facilitates the simulation of Kondo physics.Since the Kondo effect appears only for antiferromagnetic coupling,we find that the conductivity of such system exhibits an asymmetry across a resonance of spin-exchange interaction.The asymmetric conductivity can serve as the smoking gun evidence for Kondo physics in the cold atom context.When an extra magnetic field ramps up,the spin-exchange process near Fermi surface is suppressed by Zee-man energy and the conductivity becomes more and more symmetric.Our results can be verified in the current experimental setup.