Exchange interaction of hole-spin qubits in double quantum dots in highly anisotropic semiconductors

@article{Hetenyi2020ExchangeIO,
  title={Exchange interaction of hole-spin qubits in double quantum dots in highly anisotropic semiconductors},
  author={Bence Het'enyi and Christoph Kloeffel and Daniel Loss},
  journal={arXiv: Mesoscale and Nanoscale Physics},
  year={2020}
}
We study the exchange interaction between two hole-spin qubits in a double quantum dot setup in a silicon nanowire in the presence of magnetic and electric fields. Based on symmetry arguments we show that there exists an effective spin that is conserved even in highly anisotropic semiconductors, provided that the system has a twofold symmetry with respect to the direction of the applied magnetic field. This finding facilitates the definition of qubit basis states and simplifies the form of… Expand

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