Quantum-state tomography for spin-l systems -: art. no. 042108

被引：25

作者：

Hofmann, HF ^{[1
]}

Takeuchi, S ^{[1
]}

机构：

[1] Hokkaido Univ, Res Inst Elect Sci, Japan Sci & Technol Corp, PRESTO,Kita Ku, Sapporo, Hokkaido 0600812, Japan

来源：

PHYSICAL REVIEW A | 2004年 / 69卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.69.042108

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We show that the density matrix of a spin- l system can be described entirely in terms of the measurement statistics of projective spin measurements along a minimum of 4l+1 different spin directions. It is thus possible to represent the complete quantum statistics of any N-level system within the spherically symmetric three-dimensional space defined by the spin vector. An explicit method for reconstructing the density matrix of a spin-1 system from the measurement statistics of five nonorthogonal spin directions is presented and the generalization to spin- l systems is discussed.

引用

页码：042108 / 1

页数：8

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