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Quantum-control approach to realizing a Toffoli gate in circuit QED | | Vladimir M. Stojanovic
; A. Fedorov
; C. Bruder
; A. Wallraff
; | | Date: |
17 Aug 2011 | | Abstract: | We propose the realization of a Toffoli gate with superconducting qubits in a
circuit-QED setup using quantum-control methods. Starting with optimized
piecewise-constant control fields acting on all qubits and typical strengths of
XY -type coupling between the qubits, we demonstrate that the optimal gate
fidelities are affected only slightly by a "low-pass" filtering of these fields
with the typical cutoff frequencies of microwave driving. Restricting ourselves
to the range of control-field amplitudes for which the leakage to the
non-computational states of a physical qubit is heavily suppressed, we predict
that within only 75 ns a Toffoli gate can be realized with intrinsic fidelities
higher than 90%, while fidelities above 99% (99.9%) can be reached in about 140
ns (210 ns). | | Source: | arXiv, 1108.3442 | | Services: | Forum | Review | PDF | Favorites | |
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