Spin-based quantum gating with semiconductor quantum dots by bichromatic radiation method

Authors:
  • MFMang Feng
    Mang Feng
  • IDIrene D'Amico
    Irene D'Amico
  • PZPaolo Zanardi
    Paolo Zanardi
  • FRFausto Rossi
    Fausto Rossi
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Abstract
A potential scheme is proposed for realizing a two-qubit quantum gate in semiconductor quantum dots. Information is encoded in the spin degrees of freedom of one excess conduction electron of each quantum dot. We propose to use two lasers, radiation two neighboring QDs, and tuned to blue detuning with respect to the resonant frequencies of individual excitons. The two-qubit phase gate can be achieved by means of both Pauli-blocking effect and dipole-dipole coupling between intermediate excitonic states.