期刊
PHYSICAL REVIEW A
卷 92, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.92.022336
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资金
- IARPA MQCO program through ARO [W911NF-10-1-0347]
We present experimental results on two-qubit Rydberg-blockade quantum gates and entanglement in a two-dimensional qubit array. Without postselection against atom loss we achieve a Bell state fidelity of 0.73 +/- 0.05. The experiments are performed in an array of single Cs atom qubits with a site to site spacing of 3.8 mu m. Using the standard protocol for a Rydberg-blockade C-Z gate together with single qubit operations we create Bell states and measure their fidelity using parity oscillations. We analyze the role of ac Stark shifts that occur when using two-photon Rydberg excitation and show how to tune experimental conditions for optimal gate fidelity.
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