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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

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A scanning transmon qubit for strong coupling circuit quantum electrodynamics.

W E Shanks¹, D L Underwood, A A Houck

¹Department of Electrical Engineering, Princeton University, Princeton 08550, New Jersey, USA.

Nature Communications

|June 8, 2013

Summary

Researchers developed a scanning transmon qubit to probe photon numbers in superconducting resonator lattices. This new tool aids in understanding complex quantum simulations of interacting bosons.

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Area of Science:

Quantum physics
Condensed matter physics
Quantum information science

Background:

Quantum simulators model complex quantum systems intractable for classical computers.
Superconducting circuits with microwave photons in resonator lattices offer a promising platform for quantum simulation.
Understanding non-equilibrium physics of interacting bosons requires advanced measurement tools.

Purpose of the Study:

To introduce a scanning transmon qubit as a local probe for superconducting resonator lattices.
To investigate the potential of this system for quantitative modeling of quantum phenomena.
To develop new tools for analyzing complex quantum behaviors in simulated systems.

Main Methods:

Demonstration of a scanning transmon qubit's operation.
Mapping qubit-resonator coupling strength on a separate chip.
Characterizing the system's behavior in the strong coupling regime.

Main Results:

The scanning transmon qubit successfully operated as a local probe.
Strong coupling regime was achieved over a wide scanning area.
The qubit-resonator coupling was quantitatively mapped.

Conclusions:

The scanning transmon qubit is a viable tool for probing photon numbers in superconducting resonator lattices.
This method advances the capability for quantitative modeling of quantum systems.
The findings contribute to the development of novel quantum simulation techniques.