Dressed Qubits

Details Dressed Qubits Dressed Qubits

2003-03-20

arxiv.org/abs/quant-ph/0303129v3

Phys. Rev. Lett. 91, 097904 (2003)

Physics

Quantum Physics

Replaced with published version

Scientific paper

10.1103/PhysRevLett.91.097904

Inherent gate errors can arise in quantum computation when the actual system Hamiltonian or Hilbert space deviates from the desired one. Two important examples we address are spin-coupled quantum dots in the presence of spin-orbit perturbations to the Heisenberg exchange interaction, and off-resonant transitions of a qubit embedded in a multilevel Hilbert space. We propose a ``dressed qubit'' transformation for dealing with such inherent errors. Unlike quantum error correction, the dressed qubits method does not require additional operations or encoding redundancy, is insenstitive to error magnitude, and imposes no new experimental constraints.

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