Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2006-02-22
Phys. Rev. B 73, 125330 (2006)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
accepted in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.73.125330
We propose that n-type semiconductor quantum dots with the Rashba and Dresselhaus spin orbit interactions may be used for single electron manipulation through adiabatic transformations between degenerate states. All the energy levels are discrete in quantum dots and possess a double degeneracy due to time reversal symmetryin the presence of the Rashba and/or Dresselhaus spin orbit coupling terms. We find that the presence of double degeneracy does not necessarily give rise to a finite non-Abelian (matrix) Berry phase. We show that a distorted two-dimensional harmonic potential may give rise to non-Abelian Berry phases. The presence of the non-Abelian Berry phase may be tested experimentally by measuring the optical dipole transitions.
Eric Yang S.-R.
Hwang Nak Yeon
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