Electron spin coherence in semiconductors: Considerations for a spin-based solid-state quantum computer architecture
作者： Rogerio de Sousa , S. Das Sarma
DOI: 10.1103/PHYSREVB.67.033301
关键词:
摘要: We theoretically consider coherence times for spins in two quantum computer architectures, where the qubit is spin of an electron bound to a P donor impurity Si or within GaAs dot. show that low-temperature decoherence dominated by spin-spin interactions, through spectral diffusion and dipolar flip-flop mechanisms. These contributions lead 1-100-μs calculated wide range parameters, much higher than former estimates based on T* 2 measurements.
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sci-hub.se 参考文章(31)
Y. Yafet, g Factors and Spin-Lattice Relaxation of Conduction Electrons Journal of Physics C: Solid State Physics. ,vol. 14, pp. 1- 98 ,(1963) , 10.1016/S0081-1947(08)60259-3
B. E. Kane, A silicon-based nuclear spin quantum computer Nature. ,vol. 393, pp. 133- 137 ,(1998) , 10.1038/30156
D. P. DiVincenzo, G. Burkard, D. Bacon, J. Kempe, J. Kempe, K. B. Whaley, Universal quantum computation with the exchange interaction. Nature. ,vol. 408, pp. 339- 342 ,(2000) , 10.1038/35042541
H. Schneider, D. Richards, A. Fischer, K. Ploog, J. Wagner, Observation of extremely long electron-spin-relaxation times in p -type δ-doped GaAs/ Al x Ga 1 − x As double heterostructures Physical Review B. ,vol. 47, pp. 4786- 4789 ,(1993) , 10.1103/PHYSREVB.47.4786
B.E. Kane, Silicon‐Based Quantum Computation Protein Science. ,vol. 48, pp. 1023- 1041 ,(2000) , 10.1002/1521-3978(200009)48:9/11<1023::AID-PROP1023>3.0.CO;2-J
John Preskill, RELIABLE QUANTUM COMPUTERS Proceedings of The Royal Society A: Mathematical, Physical and Engineering Sciences. ,vol. 454, pp. 385- 410 ,(1998) , 10.1098/RSPA.1998.0167
Chris Hillman, H. W. Jiang, Magnetic-field pinning of a dynamic electron-spin-resonance line in a GaAs/Al x Ga 1-x As heterostructure Physical Review B. ,vol. 64, pp. 201308- ,(2001) , 10.1103/PHYSREVB.64.201308
Xuedong Hu, Rogerio de Sousa, S. Das Sarma, Interplay between Zeeman Coupling and Swap Action in Spin-Based Quantum Computer Models: Error Correction in Inhomogeneous Magnetic Fields Physical Review Letters. ,vol. 86, pp. 918- 921 ,(2001) , 10.1103/PHYSREVLETT.86.918
J. M. Kikkawa, D. D. Awschalom, Resonant Spin Amplification in n-Type GaAs Physical Review Letters. ,vol. 80, pp. 4313- 4316 ,(1998) , 10.1103/PHYSREVLETT.80.4313
G. Feher, E. A. Gere, Electron Spin Resonance Experiments on Donors in Silicon. II. Electron Spin Relaxation Effects Physical Review. ,vol. 114, pp. 1245- 1256 ,(1959) , 10.1103/PHYSREV.114.1245