Interaction induced decay of a heteronuclear two-atom system

Abstract

Two-atom systems in small traps are of fundamental interest, first of all for understanding the role of interactions in degenerate cold gases and for the creation of quantum gates in quantum information processing with single-atom traps. One of the key quantities is the inelastic relaxation (decay) time when one of the atoms or both are in a higher hyperfine state. Here we measure this quantity in a heteronuclear system of ${}^{87}$Rb and ${}^{85}$Rb in a micro optical trap and demonstrate experimentally and theoretically the presence of both fast and slow relaxation processes, depending on the choice of the initial hyperfine states. The developed experimental method allows us to single out a particular relaxation process and, in this sense, our experiment is a "superclean platform" for collisional physics studies. Our results have also implications for engineering of quantum states via controlled collisions and creation of two-qubit quantum gates.

8 pages, 3 figures

References in corpus (9)

• Controlled exchange interaction between pairs of neutral atoms in an optical lattice
• Quantum degenerate two-species Fermi-Fermi mixture coexisting with a Bose-Einstein condensate
• Energy distribution and cooling of a single atom in an optical tweezer
• Analysis of dephasing mechanisms in a standing wave dipole trap
• Observation of Heteronuclear Feshbach Molecules from a ${}^{85}$Rb - ${}^{87}$Rb gas
• Spontaneous dissociation of long-range Feshbach molecules
• Feshbach resonances in ultracold 85Rb-87Rb and 6Li-87Rb mixtures
• Predicting scattering properties of ultracold atoms: adiabatic accumulated phase method and mass scaling
• Light Assisted Collisional Loss in a ${}^{85/87}$Rb Ultracold Optical Trap

Cited by in corpus (17)

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• Entangling two atoms of different isotopes via Rydberg blockade
• Observation of Collisions between Two Ultracold Ground-State CaF Molecules
• Molecular assembly of ground state cooled single atoms
• Proposal for a Quantum Test of the Weak Equivalence Principle with Entangled Atomic Species
• Coherence preservation of a single neutral atom qubit transferred between magic-intensity optical traps
• Direct Measurements of Collisional Dynamics in Cold Atom Triads
• Preparation of a Heteronuclear Two-atom System in the 3D Motional Ground State in an Optical Tweezer
• Preparation of one ${}^{87}$Rb and one ${}^{133}$Cs atom in a single optical tweezer
• Multichannel interactions of two atoms in an optical tweezer
• Few-body correlations in two-dimensional Bose and Fermi ultracold mixtures
• Thermally-robust spin correlations between two 85Rb atoms in an optical microtrap
• Feshbach Spectroscopy of Cs Atom Pairs in Optical Tweezers
• Observation of state-to-state hyperfine-changing collision in a Bose-Fermi mixture of ${}^6$Li and ${}^{41}$K atoms
• Probing the interaction energy of two ${}^{85}$Rb atoms in an optical tweezer via spin-motion coupling
• Lellouch-Lüscher relation for ultracold few-atom systems under confinement
• All-to-all connectivity of Rydberg-atom-based quantum processors with messenger qubits