Rydberg-blockade controlled-NOT gate and entanglement in a two-dimensional array of neutral-atom qubits

被引：201

作者：

Maller, K. M. ^{[1
]}

Lichtman, M. T. ^{[1
]}

Xia, T. ^{[1
]}

Sun, Y. ^{[1
]}

Piotrowicz, M. J. ^{[1
]}

Carr, A. W. ^{[1
]}

Isenhower, L. ^{[1
]}

Saffman, M. ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

来源：

PHYSICAL REVIEW A | 2015年 / 92卷 / 02期

关键词：

Logic gates - Quantum computers - Quantum entanglement - Atoms;

D O I：

10.1103/PhysRevA.92.022336

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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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页数：12

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