Long-lived qubit memory using atomic ions

被引：275

作者：

Langer, C ^{[1
]}

Ozeri, R ^{[1
]}

Jost, JD ^{[1
]}

Chiaverini, J ^{[1
]}

DeMarco, B ^{[1
]}

Ben-Kish, A ^{[1
]}

Blakestad, RB ^{[1
]}

Britton, J ^{[1
]}

Hume, DB ^{[1
]}

Itano, WM ^{[1
]}

Leibfried, D ^{[1
]}

Reichle, R ^{[1
]}

Rosenband, T ^{[1
]}

Schaetz, T ^{[1
]}

Schmidt, PO ^{[1
]}

Wineland, DJ ^{[1
]}

机构：

[1] Natl Inst Stand & Technol, Boulder, CO 80305 USA

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.95.060502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate experimentally a robust quantum memory using a magnetic-field-independent hyperfine transition in Be-9(+) atomic ion qubits at a magnetic field B similar or equal to 0.01194 T. We observe that the single physical qubit memory coherence time is greater than 10 s, an improvement of approximately 5 orders of magnitude from previous experiments with Be-9(+). We also observe long coherence times of decoherence-free subspace logical qubits comprising two entangled physical qubits and discuss the merits of each type of qubit.

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页数：4

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