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Co-trapped heteronuclear Rydberg and Collisional Interactions in an Optical Dipole Trap

Matthew Ebert, C. Poole, Xiaoyu Jiang +3 more

Bulletin of the American Physical SocietyMay 30, 20190 citations

Excitation and interaction of Rydberg states in optical dipole traps

Erich Urban, Todd A. Johnson, Thomas Henage +5 more

Bulletin of the American Physical SocietyJun 6, 20070 citations

Independent optical control of co-located 85Rb and 87Rb ensembles for quantum information processing

Gregory Smail, Mark Bashkansky, Adam T. Black

Neutral atoms are widely used for quantum computing and quantum information applications due to their scalability and high-fidelity Rydberg interactions. Recently, dual-species single atom arrays have been demonstrated in which one species is used for computation and the other is used to perform auxiliary mid-circuit measurements. We propose the co-location of two ensembles of ultracold 85Rb and 87Rb in a crossed-beam optical dipole trap for quantum information applications. Due to the isotope shift, crosstalk between the ensembles is small and each ensemble can be addressed independently. The trapped ensembles can be made to support only a single collective Rydberg excitation while providing robustness against collisional losses. We present progress towards the independent control of two Rb ensembles co-located in a dual-species crossed beam optical dipole trap and discuss measurements of the crosstalk between the ensembles.Neutral atoms are widely used for quantum computing and quantum information applications due to their scalability and high-fidelity Rydberg interactions. Recently, dual-species single atom arrays have been demonstrated in which one species is used for computation and the other is used to perform auxiliary mid-circuit measurements. We propose the co-location of two ensembles of ultracold 85Rb and 87Rb in a crossed-beam optical dipole trap for quantum information applications. Due to the isotope shift, crosstalk between the ensembles is small and each ensemble can be addressed independently. The trapped ensembles can be made to support only a single collective Rydberg excitation while providing robustness against collisional losses. We present progress towards the independent control of two Rb ensembles co-located in a dual-species crossed beam optical dipole trap and discuss measurements of the crosstalk between the ensembles.

Quantum Computing, Communication, and SimulationMar 19, 20250 citations

Production of dual species Bose–Einstein condensates of 39K and 87Rb*

Cheng-Dong Mi, Khan Sadiq Nawaz, Peng-Jun Wang +4 more

We report the production of 39K and 87Rb Bose–Einstein condensates (BECs) in the lowest hyperfine states | F = 1,mF = 1 〉 simultaneously. We collect atoms in bright/dark magneto-optical traps (MOTs) of 39K/87Rb to overcome the light-assisted losses of 39K atoms. Gray molasses cooling on the D1 line of the 39K is used to effectively increase the phase density, which improves the loading efficiency of 39K into the quadrupole magnetic trap. Simultaneously, the normal molasses is employed for 87Rb. After the microwave evaporation cooling on 87Rb in the optically plugged magnetic trap, the atoms mixture is transferred to a crossed optical dipole trap, where the collisional properties of the two species in different combinations of the hyperfine states are studied. The dual species BECs of 39K and 87Rb are obtained by further evaporative cooling in an optical dipole trap at a magnetic field of 372.6 G with the background repulsive interspecies scattering length a KRb = 34 a 0 (a 0 is the Bohr radius) and the intraspecies scattering length a K = 20.05a 0.We report the production of 39K and 87Rb Bose–Einstein condensates (BECs) in the lowest hyperfine states | F = 1,mF = 1 〉 simultaneously. We collect atoms in bright/dark magneto-optical traps (MOTs) of 39K/87Rb to overcome the light-assisted losses of 39K atoms. Gray molasses cooling on the D1 line of the 39K is used to effectively increase the phase density, which improves the loading efficiency of 39K into the quadrupole magnetic trap. Simultaneously, the normal molasses is employed for 87Rb. After the microwave evaporation cooling on 87Rb in the optically plugged magnetic trap, the atoms mixture is transferred to a crossed optical dipole trap, where the collisional properties of the two species in different combinations of the hyperfine states are studied. The dual species BECs of 39K and 87Rb are obtained by further evaporative cooling in an optical dipole trap at a magnetic field of 372.6 G with the background repulsive interspecies scattering length a KRb = 34 a 0 (a 0 is the Bohr radius) and the intraspecies scattering length a K = 20.05a 0.

arXiv:2104.09728Chinese Physics BMar 15, 20216 citations

Cold Rydberg atom collisions in a dipole trap

Jader Cabral, Luis Gon ccalves, Jorge Douglas Massayuki Kondo +1 more

Bulletin of the American Physical SocietyJun 16, 20110 citations

Dipole–Dipole Interactions of Rydberg Atoms

Thomas F. Gallagher, P. Pillet

Advances in atomic, molecular, and optical physicsJan 1, 2008104 citations

Dual Species Rydberg and Collisional Interactions in an Optical Dipole Trap

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