%0 DATA
%A Alexander L., Rakhmanov
%A Alexandre, Zagoskin
%A Sergey, Saveliev
%A Franco, Nori
%D 2013
%T Quantum metamaterials: electromagnetic waves in a Josephson qubit line
%U https://repository.lboro.ac.uk/articles/journal_contribution/Quantum_metamaterials_electromagnetic_waves_in_a_Josephson_qubit_line/9408998
%2 https://repository.lboro.ac.uk/ndownloader/files/17026406
%K untagged
%X 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 effects, such as a “breathing” photonic crystal with an oscillating band gap and a “quantum Archimedean screw” that transports, at an arbitrary controlled velocity, Josephson plasma waves through a 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.