Heteronuclear Rydberg molecules

Abstract

We report the creation of heteronuclear ultralong-range Rydberg-molecule dimers by excitation of minority ${}^{88}\text{Sr}$ atoms to $5sns{}^3{S}_1$ Rydberg states ($n=31-39$) in a dense background of ${}^{84}\text{Sr}$. We observe an isotope shift of the $\nu =0$ vibrational state over this range of $n$ and compare our measurements with a theoretical prediction and a simple scaling argument. With the appropriate choice of principal quantum number the isotope shift is sufficiently large to produce heteronuclear dimers with almost perfect fidelity. When the spectral selectivity is limited, we obtain a lower bound on the ratio of heteronuclear to homonuclear excitation probability of 30 to 1 by measuring the scaling of the molecular excitation rate with varying relative densities of ${}^{88}\text{Sr}$ and ${}^{84}\text{Sr}$ in the ultracold mixture.

arXiv comment5 pages, 4 figures

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• Rydberg superatoms: An artificial quantum system for quantum information processing and quantum optics
• Heteronuclear long-range Rydberg molecules
• Electric field-induced wave-packet dynamics and geometrical rearrangement of trilobite Rydberg molecules
• Non-adiabatic interaction effects in the spectra of ultralong-range Rydberg molecules
• Green's function treatment of Rydberg molecules with spins
• Individual assembly of two-species Rydberg molecules using optical tweezers
• The role of Coulomb anti-blockade in the photoassociation of long-range Rydberg molecules
• Breaking and trapping Cooper pairs by Rydberg-molecule spectroscopy in atomic Fermi superfluids
• Ultralong-range Rydberg molecules of Hg atoms
• Tunable pairing with local spin-dependent Rydberg molecule potentials in an atomic Fermi superfluid
• Internal diffraction dynamics of trilobite molecules
• Spin-orbit-dependent lifetimes of long-range Rydberg molecules