Abstract
We demonstrate state encoding of multiatom ensemble qubits. Using optically trapped Rb atoms, the coherence time is 2.6(3) ms for atoms and scales approximately inversely with the number of atoms. Strong Rydberg blockade between two ensemble qubits is demonstrated with a fidelity of 0.89(1), and with a fidelity of when postselected on a control ensemble excitation. These results are a significant step towards deterministic entanglement of atomic ensembles.
- Received 16 January 2015
DOI:https://doi.org/10.1103/PhysRevLett.115.093601
© 2015 American Physical Society