Hybrid superconductor-semiconductor systems for quantum technology

Abstract

Superconducting quantum devices provide excellent connectivity and controllability while semiconductor spin qubits stand out with their long-lasting quantum coherence, fast control, and potential for miniaturization and scaling. In the last few years, remarkable progress has been made in combining superconducting circuits and semiconducting devices into hybrid quantum systems that benefit from the physical properties of both constituents. Superconducting cavities can mediate quantum-coherent coupling over long distances between electronic degrees of freedom such as the spin of individual electrons on a semiconductor chip and thus provide essential connectivity for a quantum device. Electron spins in semiconductor quantum dots have reached very long coherence times and allow for fast quantum gate operations with increasing fidelities. We summarize recent progress and theoretical models that describe superconducting-semiconducting hybrid quantum systems, explain the limitations of these systems, and describe different directions where future experiments and theory are headed.

5 pages, 3 figures

References in corpus (26)

• Coupling Superconducting Qubits via a Cavity Bus
• An addressable quantum dot qubit with fault-tolerant control fidelity
• Electrically driven single electron spin resonance in a slanting Zeeman field
• Circuit Quantum Electrodynamics with a Spin Qubit
• Prospects for Spin-Based Quantum Computing
• Dressed Collective Qubit States and the Tavis-Cummings Model in Circuit QED
• Strong Coupling of a Single Electron in Silicon to a Microwave Photon
• Scalable gate architecture for densely packed semiconductor spin qubits
• Spin relaxation and decoherence of holes in quantum dots
• Strong Coupling Cavity QED with Gate-Defined Double Quantum Dots Enabled by a High Impedance Resonator
• Spin dynamics in InAs-nanowire quantum-dots coupled to a transmission line
• Rapid high-fidelity gate-based spin read-out in silicon
• Electric Dipole Spin Resonance for Heavy Holes in Quantum Dots
• Strong coupling of a spin qubit to a superconducting stripline cavity
• Microwave-driven coherent operations of a semiconductor quantum dot charge qubit
• Ultra-long distance interaction between spin qubits
• A Reconfigurable Gate Architecture for Si/SiGe Quantum Dots
• Loading a quantum-dot based "Qubyte" register
• Photon mediated interaction between distant quantum dot circuits
• Input-output theory for spin-photon coupling in Si double quantum dots
• Measurement of valley splitting in high-symmetry Si/SiGe quantum dots
• Circuit Quantum Electrodynamics Architecture for Gate-Defined Quantum Dots in Silicon
• Dispersive readout of valley splittings in cavity-coupled silicon quantum dots
• Dispersive readout of adiabatic phases
• Universal quantum computing with correlated spin-charge states
• Protecting superconducting qubits from phonon mediated decay