Quantum technologies work by precise control of the state and interactions of individual quantum objects. Researchers at the University of Innsbruck and the Institute of Quantum Optics and Quantum Information (IQOQI) of the Austrian Academy of Sciences have now developed a method to individually address quantum emitters using tailored light pulses. “Not only is it important to individually control and read the state of the emitters,” says Oriol Romero-Isart, “but also to do so while leaving the system as undisturbed as possible.” Together with Juan José García-Ripoll (IQOQI visiting fellow) from the Instituto de Física Fundamental in Madrid, Romero-Isart’s research group has now investigated how specifically engineered pulses can be used to focus light on a single quantum emitter.
The Innsbruck experimental physicist Gerhard Kirchmair and his group now want to implement the concept for superconducting qubits in the laboratory in close collaboration with the team of theorists, who have shown that this method works not only with light or electromagnetic pulses, but also with other waves such as lattice oscillations (phonons) or magnetic excitations (magnons).
Their work has now been published in Physical Review Letters:
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