Asymmetric Conductivity as a Manifestation of Kondo Effect in Cold Atom
ORAL
Abstract
Motivated by recent theoretical and experimental advances in the quantum simulation of alkaline
earth(AE) atoms, we raise a proposal to detect the Kondo physics in cold atom system. It has been
demonstrated that the intrinsic spin-exchange interaction in AE atoms can be significantly enhanced
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
a system exhibits an asymmetry across a resonance of spin-exchange interaction. The asymmetric
conductivity can serve as the smoking gun 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
Zeeman energy and hence the conductivity becomes more and more symmetric. Our results can be
verified in the current experimental setup.
earth(AE) atoms, we raise a proposal to detect the Kondo physics in cold atom system. It has been
demonstrated that the intrinsic spin-exchange interaction in AE atoms can be significantly enhanced
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
a system exhibits an asymmetry across a resonance of spin-exchange interaction. The asymmetric
conductivity can serve as the smoking gun 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
Zeeman energy and hence the conductivity becomes more and more symmetric. Our results can be
verified in the current experimental setup.
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Presenters
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Yanting Cheng
- Tsinghua University