Demonstration of an All-Microwave Controlled-Phase Gate between Far-Detuned Qubits
Sebastian Krinner, Philipp Kurpiers, Baptiste Royer, Paul Magnard, Ivan Tsitsilin, Jean-Claude Besse, Ants Remm, Alexandre Blais, Andreas Wallraff
Abstract
One of the major challenges in building fully functional quantum computers based on superconducting circuits is a scalable, high-fidelity two-qubit gate. Microwave-induced gates are appealing, but so far have been restricted to small qubit detunings, leading to frequency crowding and reduced gate speed and qubit addressability, due to crosstalk. The authors present a high-fidelity all-microwave gate based on a Raman transition, which allows for detunings that are large compared to the anharmonicity of the qubits, setting the stage for scalable, resource-efficient quantum processors.
Topics & Concepts
TransmonQubitPhysicsQuantum decoherenceQuantum mechanicsMicrowaveQuantum computerPhase qubitTopology (electrical circuits)Coupling (piping)Coherence (philosophical gambling strategy)QuantumElectrical engineeringMechanical engineeringEngineeringQuantum Information and CryptographyQuantum Computing Algorithms and ArchitectureQuantum and electron transport phenomena