Magnetically Tunable Feshbach Resonances in Ultracold Li-Yb Mixtures

Abstract

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Prospects of forming ultracold molecules in2Σstates by magnetoassociation of alkali-metal atoms with Yb

“…If the closed-shell atom has nonzero nuclear spin, it can also couple to the unpaired electron spin. For the case of LiYb [24], this coupling has been found to be much stronger than that due to the Li nucleus. However, this latter effect is less important for the heavier alkali-metal atoms considered here, where the coupling to the alkali-metal nucleus itself is stronger.…”

“…Tables V and VI include only resonances driven by ζ (R) for Rb, which conserve m f,Rb . If the Yb isotope has nuclear spin, as for fermionic 171 Yb and 173 Yb, additional resonances can occur at crossings with m f,Rb = ±1, driven by ζ (R) for Yb [24]. In particular, 87 Rb 171 Yb has a lower-field and therefore potentially more accessible group of resonances near 1210 G, where the molecular states with m f,Rb = +2 and m i,Yb (not shown in Fig.…”

“…(31) and (32) do not take account of the Gribakin-Flambaum correction [52], which replaces the (v + 1 8 at dissociation for a long-range R −6 potential. This correction may have a significant effect on the energy of the least-bound level [65,66], which is responsible for the Feshbach resonances Li-Yb [24] but is small for the slightly deeper levels that are responsible for the resonances in the heavier A-Yb systems. As a result, the near-dissociation levels (except n = −1) actually occur at energies close to…”

“…There is now great interest in the formation of cold molecules that have both electric and magnetic dipole moments [19][20][21][22][23][24]. Such molecules offer additional possibilities for manipulation, trapping, and control because they can be influenced by both electric and magnetic fields.…”

Magnetoplasmon Fano resonance in Bose-Fermi mixtures

“…Introduction.-Hybrid Bose-Fermi systems represent a testbed for studying many-body phenomena and a promising platform for future applications [1]. In cold atomic gases, recent research has been concentrated on study devoted to the Feshbach resonance phenomena [2][3][4][5] and aimed at tuning the strength of two-particle interaction between atoms leading to new types of phase transitions [6,7]. In the solid-state, Bose-Fermi mixtures are usually studied employing exciton or excitonpolariton gases [8] which represent Bose-Einstein condensates [9,10] (BECs) interacting with either electrons and holes coexisting in the same layers or neighbouring twodimensional layers containing electronic gases (2DEG).…”