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Generation and Coherent Control of Pulsed Quantum Frequency Combs

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Multiplexing Superconducting Qubit Circuit for Single Microwave Photon Generation.

R E George¹, J Senior², O-P Saira²

¹1Physics Department, Lancaster University, Lancaster, LA1 4YB UK.

Journal of Low Temperature Physics

|February 7, 2020

Summary

This summary is machine-generated.

This study presents a novel device with eight superconducting transmon qubits and resonators, enabling efficient, on-demand single microwave photon generation with over 80% efficiency.

Keywords:

Single photon generation Superconducting qubit Superconducting resonator Transmon

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Area of Science:

Quantum computing and superconducting circuits.
Development of scalable quantum hardware.

Background:

Superconducting qubits are crucial for quantum computation.
Individual addressing of multiple qubits is a challenge in hardware development.

Purpose of the Study:

To report on a device integrating eight superconducting transmon qubits and coplanar waveguide resonators.
To demonstrate individual addressing and characterization of qubits and resonators.
To assess the device's suitability for generating single microwave photons.

Main Methods:

Integration of eight superconducting transmon qubits within a multiplexed architecture of coplanar waveguide resonators.
Individual addressing of resonators and qubits via a common feedline.
Spectroscopic methods for individual characterization.

Main Results:

Device parameters match design specifications.
Qubits and resonators demonstrate excellent coherence and strong coupling.
Qubit relaxation is dominated by the Purcell effect when in resonance.
On-demand single microwave photon generation efficiency exceeds 80%.

Conclusions:

The developed multiplexing architecture allows for efficient individual qubit and resonator control.
The device exhibits high performance, suitable for quantum information processing.
The demonstrated high efficiency in single microwave photon generation is a significant advancement.