|Title||Rydberg-Mediated Entanglement in a Two-Dimensional Neutral Atom Qubit Array|
|Publication Type||Journal Article|
|Year of Publication||2019|
|Authors||T.. M. Graham, M.. Kwon, B.. Grinkemeyer, Z.. Marra, X.. Jiang, M.. T. Lichtman, Y.. Sun, M.. Ebert, and M.. Saffman|
|Journal||Phys. Rev. Lett.|
|Date Published||DEC 4|
|Type of Article||Article|
We demonstrate high fidelity two-qubit Rydberg blockade and entanglement on a pair of sites in a large two-dimensional qubit array. The qubit array is defined by a grid of blue detuned lines of light with 121 sites for trapping atomic qubits. Improved experimental methods have increased the observed Bell state fidelity to F-Bell = 0.86(2). Accounting for errors in state preparation and measurement we infer a fidelity of F-(SPAM)(Bell) = 0.88. Accounting for errors in single qubit operations we infer that a Bell state created with the Rydberg mediated C-Z gate has a fidelity of F-Bell(CZ) = 0.89. Comparison with a detailed error model based on quantum process matrices indicates that finite atom temperature and laser noise are the dominant error sources contributing to the observed gate infidelity.