Current technology enables the building of electrical circuits similar to those we use at home but reduced thousands of times in size to a micrometric scale of thousandths of a millimeter. When these circuits are built of superconductor materials and at near-absolute zero cryogenic temperatures, the world of everyday physics is left behind and the amazing world of quantum physics is entered. In this circuit the behavior is something like an artificial atom (i.e. like the so-called quantum bits ("qubits") of quantum computers) and the concepts of quantum optics, quantum information and condensed matter are mixed.
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