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FEDジャ-ナル

Artificial Atoms:Their Physics and Potential Application

M. A. Kastner

Published Oct 1, 1996• 3 citations
OpenAlex

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A review is presented of recent research by the authors and their collaborators, including two papers published in 2005 in Physical Review Letters. The two main topics are: (1) The quantum“ Bang- Bang” control of a superconducting charge qubit is utilized to cool its coupled nano-mechanical resonator so that the ground state can be reached, by means of which the GHz oscillating nano-mechanical resonator can display the enriching quantum effect; (2)The physical realization of Δ type artificial atoms as a superconducting circuit and the exotic features of its adiabatic manipulation. To understand fully the physics and potential application in modern technology of these two topics, we also review their background relevant to the cavity quantum electrodynamics structure based solid state artificial atoms formed by superconducting circuits and the GHz oscillating nano-systems with certain strong couplings.
We investigate the power spectral density emitted by a superconducting artificial atom coupled to the end of a semi-infinite transmission line and driven by two continuous radio frequency fields. In this setup, we observe the generation of multiple frequency peaks and the formation of frequency combs with equal detuning between those peaks. The frequency peaks originate from wave mixing of the drive fields, mediated by the artificial atom, highlighting the potential of this system as both a frequency converter and a frequency-comb generator. We demonstrate precise control and tunability in generating these frequency features, aligning well with theoretical predictions, across a relatively wide frequency range (tens of MHz, exceeding the linewidth of the artificial atom). The extensive and simple tunability of this frequency converter and comb generator, combined with its small physical footprint, makes it promising for quantum optics on chips and other applications in quantum technology.