2016/10/19 by Yin Zhong, Yu Liu, Hong-Gang Luo
Physics and Astronomy · #Anderson impurity model #Atomic orbital #Cold Atom Physics and Bose-Einstein Condensates #Electron #Excited state #Fermion #Ground state #Lattice (music) #Physics of Superconductivity and Magnetism #Quantum #Quantum Monte Carlo #Rare-earth and actinide compounds #Trapping #cond-mat.quant-gas #cond-mat.str-el #cond-mat.supr-con #quant-ph
paper · pdf · doi:10.1007/s11467-017-0690-x
published as Front. Phys. 12(5), 127502 (2017) · 8 pages, 5 figures, discussion, acknowledge and references updated
arxiv created 2016/10/19 · openalex created_date 2016/10/28 · arxiv updated 2017/05/09 · openalex publication_date 2017/05/22 · openalex updated_date 2026/08/05
The periodic Anderson model (PAM), where local electron orbitals interplay with itinerant electronic carriers, plays an essential role in our understanding of heavy fermion materials. Motivated by recent proposals for simulating the Kondo lattice model (KLM) in terms of alkaline-earth metal atoms, we take another step toward the simulation of PAM, which includes the crucial charge/valence fluctuation of local f-electrons beyond purely low-energy spin fluctuation in the KLM. To realize PAM, a transition induced by a suitable laser between the electronic excited and ground state of alkaline-earth metal atoms (1 S 0⇌3 P 0) is introduced. This leads to effective hybridization between local electrons and conduction electrons in PAM. Generally, the SU(N) version of PAM can be realized by our proposal, which gives a unique opportunity to detect large-N physics without complexity in realistic materials. In the present work, high-temperature physical features of standard [SU(2)] PAM with harmonic trapping potential are analyzed by quantum Monte Carlo and dynamic mean-field theory, where the Mott/orbital-selective Mott state was found to coexist with metallic states. Indications for near-future experiments are provided. We expect our theoretical proposal and (hopefully) forthcoming experiments will deepen our understanding of heavy fermion systems. At the same time, we hope these will trigger further studies on related Mott physics, quantum criticality, and non-trivial topology in both the inhomogeneous and nonequilibrium realms.