Sarah Sheldon, Martin Sandberg, et al.
Applied Physics Letters
Effective Hamiltonian methods are utilized to model the two-qubit cross-resonance gate for both the ideal two-qubit case and when higher levels are included. Analytic expressions are obtained in the qubit case and the higher-level model is solved both perturbatively and numerically, with the solutions agreeing well in the weak-drive limit. The methods are applied to parameters from recent experiments and, accounting for classical cross-talk effects, results in good agreement between theory and experimental results.
Sarah Sheldon, Martin Sandberg, et al.
Applied Physics Letters
Jerry M. Chow, Jay M. Gambetta, et al.
New Journal of Physics
Sarah Sheldon, Lev S. Bishop, et al.
Physical Review A
Nikolaj Moll, Panagiotis Kl. Barkoutsos, et al.
Quantum Science and Technology