Spin decay and quantum parallelism

2019-12-11 17:40:49

single quantum nuclear spin Phys

责任者: Schliemann, J.;Khaetskii, A.V.;Loss, D. 单位: Dept. of Phys. & Astron., Univ. of Basel, Switzerland 来源出处: Physical Review B (Condensed Matter and Materials Physics)(Phys. Rev., B, Condens, Matter Mater. Phys. (USA)),2002/12/15,66(24):245303-1 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 关键词: electron spin polarisation;quantum interference phenomena;spin dynamics;spin decay;quantum parallelism;time evolution;single spin;semiconductor nanostructure;single electron spin;nuclear spins;randomly correlated states;quantum entanglement;decoherence phenomenon