To realize a practical quantum computer, it is necessary to control the state of a huge number of qubits (as many as one million) operating at low temperature. In conventional quantum computers, microwave signals for controlling qubits are generated at room temperature and are individually transmitted to qubits at low temperature via different cables. This results in numerous cables between room and low temperature and limits the number of controllable qubits to approximately 1,000.In this study, a superconducting circuit that can control multiple qubits via a single cable using microwave multiplexing was successfully demonstrated in proof-of-concept experiments at 4.2 K in liquid helium. This circuit has the potential of increasing the density of microwave signals per cable by approximately 1,000 times, thereby increasing the number of controllable qubits significantly and contributing to the development of large-scale quantum computers.The above results will be published in "npj Quantum Information" on
Article Information
Journal: npj Quantum Information
Title: Microwave-multiplexed qubit controller using adiabatic superconductor logic
Authors:
DOI: 10.1038/s41534-024-00849-2
About
Copyright 2024 JCN Newswire . All rights reserved.
© Japan Corporate News, source