Quantum-state tomography of a single nuclear spin qubit of an optically manipulated ytterbium atom

被引：17

作者：

Noguchi, Atsushi ^{[1
,2
]}

Eto, Yujiro ^{[2
]}

Ueda, Masahito ^{[2
,3
]}

Kozuma, Mikio ^{[1
,2
]}

机构：

[1] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528550, Japan

[2] JST, ERATO Macroscop Quantum Control Project, Bunkyo Ku, Tokyo 1138656, Japan

[3] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

来源：

PHYSICAL REVIEW A | 2011年 / 84卷 / 03期

关键词：

Cavity QED techniques - High finesse optical cavities - High-efficiency - Hyperfine coupling - Nuclear magnetic resonance techniques - Nuclear spin state - Projective measurement - Quantum state tomography;

D O I：

10.1103/PhysRevA.84.030301

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A single Yb atom is loaded into a high-finesse optical cavity with a moving lattice, and its nuclear spin state is manipulated using a nuclear magnetic resonance technique. A highly reliable quantum state control with fidelity and purity greater than 0.98 and 0.96, respectively, is confirmed by the full quantum state tomography; a projective measurement with high speed (500 mu s) and high efficiency (0.98) is accomplished using the cavity QED technique. Because a hyperfine coupling is induced only when the projective measurement is operational, the long coherence times (T1 = 0.49 s and T2 = 0.10 s) are maintained.

引用

页数：4

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