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Optimal operating conditions of an entangling two-transmon gate

Antonio D'Arrigo, Elisabetta Paladino
2012 New Journal of Physics  
We identify optimal operating conditions of an entangling two-qubit gate realized by a capacitive coupling of two superconducting charge qubits in a transmission line resonator (the so called "transmons"). We demonstrate that the sensitivity of the optimized gate to 1/f flux and critical current noise is suppressed to leading order. The procedure only requires a preliminary estimate of the 1/f noise amplitudes. No additional control or bias line beyond those used for the manipulation of
more » ... pulation of individual qubits are needed. The proposed optimization is effective also in the presence of relaxation processes and of spontaneous emission through the resonator (Purcell effect).
doi:10.1088/1367-2630/14/5/053035 fatcat:oyt2kqfv6fcptfy2zzsug3js3y