Coherent output of photons from coupled superconducting transmission line resonators controlled by charge qubits
Lan Zhou, Y. B. Gao, Z. Song, C. P. Sun
DOI 10.1103/PhysRevA.77.013831 · Physical Review A
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Abstract
We study the coherent control of microwave photons propagating in a superconducting waveguide consisting of coupled transmission line resonators, each of which is connected to a tunable charge qubit. While these coupled line resonators form an artificial photonic crystal with an engineered photonic band structure, the charge qubits collectively behave as spin waves in the low excitation limit, which modify the band-gap structure to slow and stop the microwave propagation. The conceptual exploration here suggests an electromagnetically controlled quantum device based on the on-chip circuit QED for the coherent manipulation of photons, such as the dynamic creation of laserlike output from the waveguide by pumping the artificial atoms for population inversion.
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