Orthogonal frequency-division multiplexing for simultaneous gate operations on multiple qubits via a shared control line

Abstract

The increasing number of qubits in quantum processors necessitates a corresponding increase in the number of control lines between the processor, which is typically operated at cryogenic temperatures, and external electronics. Scaling poses significant challenges in terms of the thermal loads, forming a major bottleneck in the realization of large-scale quantum computers. In this study, we analyze simultaneous gate operations on multiple qubits using microwaves transmitted via a single cable in a frequency-division multiplexing (FDM) scheme. By employing rectangular control microwave pulses, we reveal the contribution of drive frequency spacing to gate fidelity. Through theoretical and numerical analyses, we demonstrate that orthogonal and quasi-orthogonal microwave signals suppress interference in simultaneously driven qubits, thereby ensuring high gate fidelity. Additionally, we provide design guidelines for key parameters, including pulse length, number of multiplexed microwave signals, and rotation angle, to achieve precise qubit operations. Our findings enable a scalable FDM-based microwave control scheme suitable for quantum processors with a large number of qubits.

10 pages, 8 figures

References in corpus (31)

• Supplementary information for "Quantum supremacy using a programmable superconducting processor"
• A variational eigenvalue solver on a quantum processor
• Charge insensitive qubit design derived from the Cooper pair box
• Quantum algorithm for solving linear systems of equations
• Surface codes: Towards practical large-scale quantum computation
• Hardware-efficient Variational Quantum Eigensolver for Small Molecules and Quantum Magnets
• Cavity quantum electrodynamics for superconducting electrical circuits: an architecture for quantum computation
• A Quantum Engineer's Guide to Superconducting Qubits
• Quantum support vector machine for big data classification
• Quantum Circuit Learning
• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Logical quantum processor based on reconfigurable atom arrays
• Hartree-Fock on a superconducting qubit quantum computer
• Quantum error correction below the surface code threshold
• Efficient Z-Gates for Quantum Computing
• A Game of Surface Codes: Large-Scale Quantum Computing with Lattice Surgery
• Realization of an Error-Correcting Surface Code with Superconducting Qubits
• Fidelity of quantum operations
• Cryogenic Control Architecture for Large-Scale Quantum Computing
• CMOS-based cryogenic control of silicon quantum circuits
• Analytic control methods for high fidelity unitary operations in a weakly nonlinear oscillator
• Quantum Algorithm for Simulating the Wave Equation
• Propagating Gottesman-Kitaev-Preskill states encoded in an optical oscillator
• The impact of classical control electronics on qubit fidelity
• Microwave-multiplexed qubit controller using adiabatic superconductor logic
• Quantum algorithm for partial differential equations of non-conservative systems with spatially varying parameters
• Baseband control of superconducting qubits with shared microwave drives
• Active Leakage Cancellation in Single Qubit Gates
• Quantum-Computer-Based Verification of Quantum Thermodynamic Uncertainty Relation
• Globally driven superconducting quantum computing architecture
• Selective Excitation of Superconducting Qubits with a Shared Control Line through Pulse Shaping