Excitation spectrum as a resource for efficient two-qubit entangling gates

@article{Solenov2014ExcitationSA,
  title={Excitation spectrum as a resource for efficient two-qubit entangling gates},
  author={Dmitry Solenov and Sophia E. Economou and Thomas L. Reinecke},
  journal={Physical Review B},
  year={2014},
  volume={89},
  pages={155404}
}
Physical systems representing qubits typically have one or more accessible quantum states in addition to the two states that encode the qubit. We demonstrate that active involvement of such auxiliary states can be beneficial in constructing entangling two-qubit operations. We investigate the general case of two multistate quantum systems coupled via a quantum resonator. The approach is illustrated with the examples of three systems: self-assembled InAs/GaAs quantum dots, NV centers in diamond… Expand
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