Quantum metamaterials: electromagnetic waves in a Josephson qubit line
Alexander L. Rakhmanov
Alexandre Zagoskin
Sergey Saveliev
Franco Nori
2134/12797
https://repository.lboro.ac.uk/articles/Quantum_metamaterials_electromagnetic_waves_in_a_Josephson_qubit_line/9408998
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.
2013-07-23 11:31:39
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