Rydberg blockade of atomic ensemble qubits

ORAL

Abstract

We demonstrate \textbar W\textgreater state encoding of multi-atom ensemble qubits. Using optically trapped Rb atoms the T2 coherence time is 2.6(3) ms for an average ensemble number of N $=$ 7.6 atoms and scales approximately inversely with N. Strong Rydberg blockade between two ensemble qubits is demonstrated with a fidelity of 0.89(1) and a fidelity of $\sim $1.0 when postselected on control ensemble excitation. We will present progress towards entanglement of two ensemble qubits using the Rydberg blockade interaction.

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Authors

  • Minho Kwon

    University of Wisconsin

  • Matt Ebert

    University of Wisconsin

  • Dahan Kim

    University of Wisconsin

  • Thad Walker

    University of Wisconsin-Madison, University of Wisconsin Madison, University of Wisconsin, University of Wisconsin, Madison

  • Mark Saffman

    University of Wisconsin, Madison, Department of Physics, University of Wisconsin, 1150 University Avenue, Madison, Wisconsin 53706, Department of Physics, University of Wisconsin, Madison, WI., University of Wisconsin, University of Wisconsin-Madison