Spin decay and quantum parallelism

被引：102

作者：

Schliemann, J ^{[1
]}

Khaetskii, AV ^{[1
]}

Loss, D ^{[1
]}

机构：

[1] Univ Basel, Dept Phys & Astron, CH-4056 Basel, Switzerland

来源：

PHYSICAL REVIEW B | 2002年 / 66卷 / 24期

关键词：

D O I：

10.1103/PhysRevB.66.245303

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the time evolution of a single spin coupled inhomogeneously to a spin environment. Such a system is realized by a single electron spin bound in a semiconductor nanostructure and interacting with surrounding nuclear spins. We find striking dependencies on the type of initial state of the nuclear spin system. Simple product states show a profoundly different behavior than randomly correlated states whose time evolution provides an illustrative example of quantum parallelism and entanglement in a decoherence phenomenon.

引用

页码：1 / 6

页数：6

共 24 条

[1]

[Anonymous], SEMICONDUCTOR SPINTR

[2] Concentrating partial entanglement by local operations [J].

Bennett, CH ;

Bernstein, HJ ;

Popescu, S ;

Schumacher, B .

PHYSICAL REVIEW A, 1996, 53 (04) :2046-2052

[3]

DESOUSA R, CONDMAT0203101

[4]

DOBROVITSKI VV, QUANTPH0112053

[5]

Dyakonov M. I., 1984, Optical Orientation, P11

[6] Hyperfine-mediated transitions between a Zeeman split doublet in GaAs quantum dots: The role of the internal field [J].

Erlingsson, SI ;

Nazarov, YV .

PHYSICAL REVIEW B, 2002, 66 (15) :1-7

[7] Nucleus-mediated spin-flip transitions in GaAs quantum dots [J].

Erlingsson, SI ;

Nazarov, YV ;

Fal'ko, VI .

PHYSICAL REVIEW B, 2001, 64 (19)

[8] Dephasing by two-level systems at zero temperature by unitary evolution [J].

Frasca, M .

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2002, 15 (04) :252-260

[9] A silicon-based nuclear spin quantum computer [J].

Kane, BE .

NATURE, 1998, 393 (6681) :133-137

[10] Electron spin decoherence in quantum dots due to interaction with nuclei [J].

Khaetskii, AV ;

Loss, D ;

Glazman, L .

PHYSICAL REVIEW LETTERS, 2002, 88 (18) :1868021-1868024

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