Portal de Periódicos da CAPES

Error rate of the Kane quantum computer controlled-NOT gate in the presence of dephasing

2003; American Physical Society; Volume: 67; Issue: 1 Linguagem: Inglês

10.1103/physreva.67.012301

1538-4446

Austin G. Fowler, Cameron Wellard, Lloyd C. L. Hollenberg,

Quantum Information and Cryptography

We study the error rate of controlled-NOT (CNOT) operations in the Kane solid-state quantum computer architecture [B. Kane, Nature 393, 133 (1998)]. A spin Hamiltonian is used to describe the system. Dephasing is included as exponential decay of the off-diagonal elements of the system's density matrix. Using available spin-echo decay data, the CNOT error rate is estimated at $\ensuremath{\approx}{10}^{\ensuremath{-}3}.$