Microwave-based arbitrary cphase gates for transmon qubits
George S. Barron, F. A. Calderon-Vargas, Junling Long, David P. Pappas, Sophia E. Economou
Abstract
Superconducting transmon qubits are of great interest for quantum computing and quantum simulation. A key component of quantum chemistry simulation algorithms is breaking up the evolution into small steps, which naturally leads to the need for nonmaximally entangling, arbitrary CPHASE gates. Here we design such microwave-based gates using an analytically solvable approach leading to smooth, simple pulses. We use the local invariants of the evolution operator in SU(4) to develop a method of constructing pulse protocols, which allows for the continuous tuning of the phase. We find CPHASE fidelities of more than 0.999 and gate times as low as 100 ns.
Topics & Concepts
TransmonQubitMicrowaveQuantum computerQuantum gateOperator (biology)Quantum mechanicsPhysicsKey (lock)QuantumTopology (electrical circuits)Computer scienceElectronic engineeringElectrical engineeringEngineeringChemistryComputer securityRepressorTranscription factorBiochemistryGeneQuantum Computing Algorithms and ArchitectureQuantum Information and CryptographyQuantum and electron transport phenomena