Demonstration of Two-Atom Entanglement with Ultrafast Optical Pulses

被引：63

作者：

Wong-Campos, J. D. ^{[1
]}

Moses, S. A.

Johnson, K. G.

Monroe, C.

机构：

[1] Univ Maryland, Joint Quantum Inst, Joint Ctr Quantum Informat & Comp Sci, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 119卷 / 23期

基金：

美国国家科学基金会;

关键词：

TRAPPED IONS; STATES; QUBITS; ATOM;

D O I：

10.1103/PhysRevLett.119.230501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate quantum entanglement of two trapped atomic ion qubits using a sequence of ultrafast laser pulses. Unlike previous demonstrations of entanglement mediated by the Coulomb interaction, this scheme does not require confinement to the Lamb-Dicke regime and can be less sensitive to ambient noise due to its speed. To elucidate the physics of an ultrafast phase gate, we generate a high entanglement rate using just ten pulses, each of similar to 20 ps duration, and demonstrate an entangled Bell state with (76 +/- 1)% fidelity. These results pave the way for entanglement operations within a large collection of qubits by exciting only local modes of motion.

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页数：5

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