Controlled-NOT logic gate for phase qubits based on conditional spectroscopy
arXiv:1102.0353 · doi:10.1007/s11128-011-0274-6
Abstract
A controlled-NOT logic gate based on conditional spectroscopy has been demonstrated recently for a pair of superconducting flux qubits [Plantenberg et al., Nature 447, 836 (2007)]. Here we study the fidelity of this type of gate applied to a phase qubit coupled to a resonator (or a pair of capacitively coupled phase qubits). Our results show that an intrinsic fidelity of more than 99% is achievable in 45ns.
5 pages, 5 figures, To appear in Quantum Inf. Proc
References in corpus (7)
- Superconducting Circuits and Quantum Information
- Simple pulses for elimination of leakage in weakly nonlinear qubits
- Analysis of a tuneable coupler for superconducting phase qubits
- The distribution of quantum fidelities
- Generation of high-fidelity controlled-not logic gates by coupled superconducting qubits
- Controlled-NOT gate with weakly coupled qubits: Dependence of fidelity on the form of interaction
- Single-step controlled-NOT logic from any exchange interaction