Analyzing the Toffoli gate in disordered circuit QED
arXiv:1302.6565 · doi:10.1103/PhysRevA.87.042324
Abstract
We study the effects of imperfections on the fidelity of the Toffoli gate recently realized in a circuit~QED setup using quantum control methods. The noise is introduced in the interqubits interactions. The coupling constants are no longer fixed; instead, they fluctuate around average values obeying some given probability density functions characterizing the dynamical-imperfection case. We also consider the static-imperfection case in which the values of the coupling constants are not exactly known. We obtain a more robust gate by modifying the quantum optimization problem using a weighted average of the fidelity over an interval of coupling values as the objective functional.
7 pages, 3 figures
References in corpus (13)
- Charge insensitive qubit design derived from the Cooper pair box
- Coupling Superconducting Qubits via a Cavity Bus
- Realization of Three-Qubit Quantum Error Correction with Superconducting Circuits
- Implementation of a Toffoli Gate with Superconducting Circuits
- Realization of the quantum Toffoli gate with trapped ions
- Dicke quantum spin glass of atoms and photons
- Entanglement dynamics in chains of qubits with noise and disorder
- High-order noise filtering in nontrivial quantum logic gates
- Quantum-control approach to realizing a Toffoli gate in circuit QED
- Fully-connected network of superconducting qubits in a cavity
- Dynamics of entanglement in quantum computers with imperfections
- Controlling qubit arrays with anisotropic XXZ Heisenberg interaction by acting on a single qubit
- Implementation of three-qubit Toffoli gate in a single step