Publikation:

Universal set of quantum gates for double-dot spin qubits with fixed interdot coupling

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2007

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Hanson, Ronald

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http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-91121
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https://doi.org/10.1103/PhysRevLett.98.050502
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http://arxiv.org/abs/cond-mat/0605576

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Physical Review Letters. 2007, 98, 50502. Available under: doi: 10.1103/PhysRevLett.98.050502

Zusammenfassung

We propose a set of universal gate operations for the singlet-triplet qubit realized by two electron spins in a double quantum dot, in the presence of a fixed inhomogeneous magnetic field. All gate operations are achieved by switching the potential offset between the two dots with an electrical bias, and do not require time-dependent control of the tunnel coupling between the dots. We analyze the two-electron dynamics and calculate the effective qubit rotation angle as a function of the applied electric bias. We present explicit gate sequences for single-qubit rotations about two orthogonal axes, and a CNOT gate sequence, completing the universal gate set.

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ISO 690HANSON, Ronald, Guido BURKARD, 2007. Universal set of quantum gates for double-dot spin qubits with fixed interdot coupling. In: Physical Review Letters. 2007, 98, 50502. Available under: doi: 10.1103/PhysRevLett.98.050502
BibTex
@article{Hanson2007Unive-8864,
  year={2007},
  doi={10.1103/PhysRevLett.98.050502},
  title={Universal set of quantum gates for double-dot spin qubits with fixed interdot coupling},
  volume={98},
  journal={Physical Review Letters},
  author={Hanson, Ronald and Burkard, Guido},
  note={Article Number: 50502}
}
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