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Quantum computation in semiconductor quantum dots of electron-spin asymmetric anisotropic exchange
Xiang Hao #,Shiqun Zhu *
School of Physical Science and Technology, Suzhou University,
*Correspondence author
#Submitted by
Subject:
Funding: the Doctoral Program of Higher Education of China，the National Natural Science Foundation of China（No.20050285002，10774108）
Opened online:12 September 2008
Accepted by: none
Citation: Xiang Hao,Shiqun Zhu.Quantum computation in semiconductor quantum dots of electron-spin asymmetric anisotropic exchange[OL]. [12 September 2008] http://en.paper.edu.cn/en_releasepaper/content/24010
 
 
The universal quantum computation is obtained when there exists asymmetric anisotropic exchange between electron spins in coupled semiconductor quantum dots. The asymmetric Heisenberg model can be transformed into the isotropic model through the control of two local unitary rotations for the realization of essential quantum gates. The rotations on each qubit are symmetrical and depend on the strength and orientation of asymmetric exchange. The implementation of the axially symmetric local magnetic fields can assist the construction of quantum logic gates in anisotropic coupled quantum dots. This proposal can efficiently use each physical electron spin as a logical qubit in the universal quantum computation.
Keywords:Anisotropic;Quantum Dot;Heisenberg Model
 
 
 

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