A collaboration of experimental and theoretical groups, lead by Johann Kroha of the Physikalische Institut at the University of Bonn and Manfred Fiebig of the Materials Department at the ETH, shows that certain materials emit optical echo pulses that reveal direct information about the quantum-mechanical nature of these systems.
Echoes from the quantum world Time-resolved collapse and revival of the Kondo state near a quantum phase transition
Heavy Fermion: THz time-domain spectroscopy
© Universität Bonn/ Johann Kroha
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