4 papers
Reducing unitary and spectator errors in cross resonance with optimized rotary echoes
Neereja Sundaresan, Isaac Lauer, Emily Pritchett +3
We present an improvement to the cross resonance gate realized with the addition of resonant, target rotary pulses. These pulses, applied directly to the target qubit, are simultan…
First-principles analysis of cross-resonance gate operation
Moein Malekakhlagh, Easwar Magesan, David C. McKay
We present a comprehensive theoretical study of the cross-resonance gate operation covering estimates for gate parameters and gate error as well as analyzing spectator qubits and m…
Effective Hamiltonian models of the cross-resonance gate
Easwar Magesan, Jay M. Gambetta
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 a…
Procedure for systematically tuning up crosstalk in the cross resonance gate
Sarah Sheldon, Easwar Magesan, Jerry M. Chow +1
We present improvements in both theoretical understanding and experimental implementation of the cross resonance (CR) gate that have led to shorter two-qubit gate times and interle…