Spin decay and quantum parallelism

Details Spin decay and quantum parallelism Spin decay and quantum parallelism

2002-07-08

arxiv.org/abs/cond-mat/0207195v2

Phys. Rev. B 66, 245303 (2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 4 figures included, version to appear in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.66.245303

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 the 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.

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