QUROPE Quantum Information Processing and Communication in Europe

In their recent article in Science Magazine the SOLID group at KIT led by Alexey Ustinov demonstrated experimentally that minute deformation of the oxide barrier changes the energies of the atomic tunneling systems, and measured these changes by microwave spectroscopy of the superconducting qubit through coherent interactions between these two quantum systems. By measuring the dependence of the energy splitting of atomic tunneling states on external strain, the group could verify a central hypothesis of the two-level tunneling model for disordered solids.