Experimental quantum-state tomography of a solid-state qubit

被引：73

作者：

Rippe, L. ^{[1
]}

Julsgaard, B. ^{[1
]}

Walther, A. ^{[1
]}

Ying, Yan ^{[1
]}

Kroll, S. ^{[1
]}

机构：

[1] Lund Inst Technol, Dept Phys, SE-22100 Lund, Sweden

来源：

PHYSICAL REVIEW A | 2008年 / 77卷 / 02期

关键词：

D O I：

10.1103/PhysRevA.77.022307

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Quantum-state tomography is used to characterize the state of an ensemble based qubit implemented through two hyperfine levels in Pr3+ ions, doped into a Y2SiO5 crystal. We experimentally verify that single-qubit rotation errors due to inhomogeneities of the ensemble can be suppressed using the Roos-Molmer dark-state scheme [Roos and Molmer, Phys. Rev. A 69, 022321 (2004)] Fidelities above > 90%, presumably limited by excited state decoherence, were achieved. Although not explicitly taken care of in the Roos-Molmer scheme, it appears that also decoherence due to inhomogeneous broadening on the hyperfine transition is largely suppressed.

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页数：5

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