Reconstructing a pure state of a spin s through three Stern-Gerlach measurements

被引：33

作者：

Amiet, JP ^{[1
]}

Weigert, S ^{[1
]}

机构：

[1] Univ Neuchatel, Inst Phys, CH-2000 Neuchatel, Switzerland

来源：

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL | 1999年 / 32卷 / 15期

关键词：

D O I：

10.1088/0305-4470/32/15/006

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Consider a spin s prepared in a pure state. It is shown that, generically, the moduli of the (2s + 1) spin components along three directions in space determine the state unambiguously. These probabilities are accessible experimentally by means of a standard Stern-Gerlach apparatus. It is therefore possible to reconstruct, a generic pure state on the basis of 6s independent measured intensities.

引用

页码：2777 / 2784

页数：8

共 16 条

[1] Reconstructing the density matrix of a spin s through Stern-Gerlach measurements [J].

Amiet, JP ;

Weigert, S .

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 1998, 31 (31) :L543-L548

[2]

BOHN J, 1991, PHYS REV LETT, V66, P1434

[3] Quantum state reconstruction and detection of quantum coherences on different observation levels [J].

Buzek, V ;

Adam, G ;

Drobny, G .

PHYSICAL REVIEW A, 1996, 54 (01) :804-820

[4] EXPERIMENTAL-DETERMINATION OF THE QUANTUM-MECHANICAL STATE OF A MOLECULAR VIBRATIONAL-MODE USING FLUORESCENCE TOMOGRAPHY [J].

DUNN, TJ ;

WALMSLEY, IA ;

MUKAMEL, S .

PHYSICAL REVIEW LETTERS, 1995, 74 (06) :884-887

[5]

GALE W, 1968, PHYS REV, V165, P1414

[6] Measurement of the Wigner function of an ensemble of helium atoms [J].

Kurtsiefer, C ;

Pfau, T ;

Mlynek, J .

NATURE, 1997, 386 (6621) :150-153

[7] Shadows and mirrors: Reconstructing quantum states of atom motion [J].

Leibfried, D ;

Pfau, T ;

Monroe, C .

PHYSICS TODAY, 1998, 51 (04) :22-28

[8] Experimental determination of the motional quantum state of a trapped atom [J].

Leibfried, D ;

Meekhof, DM ;

King, BE ;

Monroe, C ;

Itano, WM ;

Wineland, DJ .

PHYSICAL REVIEW LETTERS, 1996, 77 (21) :4281-4285

[9] QUANTUM-STATE TOMOGRAPHY AND DISCRETE WIGNER FUNCTION [J].

LEONHARDT, U .

PHYSICAL REVIEW LETTERS, 1995, 74 (21) :4101-4105

[10] MEASURABILITY OF SPIN DENSITY MATRIX [J].

NEWTON, RG ;

YOUNG, BL .

ANNALS OF PHYSICS, 1968, 49 (03) :393-&

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