Quantum metamaterials: Electromagnetic waves in a Josephson qubit line

Details Quantum metamaterials: Electromagnetic waves in a Josephson qubit line Quantum metamaterials: Electromagnetic waves in a Josephson qubit line

2007-09-10

arxiv.org/abs/0709.1314v2

Phys. Rev. B 77, 144507 (2008) (Editors' Suggestion)

Physics

Condensed Matter

Superconductivity

References added

Scientific paper

10.1103/PhysRevB.77.144507

We consider the propagation of a classical electromagnetic wave through a transmission line, formed by identical superconducting charge qubits inside a superconducting resonator. Since the qubits can be in a coherent superposition of quantum states, we show that such a system demonstrates interesting new effects, such as a ``breathing'' photonic crystal with an oscillating bandgap, and a ``quantum Archimedean screw'' that transports, at an arbitrary controlled velocity, Josephson plasma waves through the transmission line. The key ingredient of these effects is that the optical properties of the Josephson transmission line are controlled by the quantum coherent state of the qubits.

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