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Quantum technologies

Dieter Meschede's research group
Home Group members Manolo Rivera Lam
Group members
MSc. Manolo Rivera Lam
Position: PhD student
Field of research: Few-atom quantum systems
Office room: 224
Laboratory room: 214b
E-mail: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it.
Office: +49 228 73-3128
Laboratory: +49 228 73-3454
Fax: +49 228 73-3474


  • M. R. Lam, N. Peter, T. Groh, W. Alt, C. Robens, D. Meschede, A. Negretti, S. Montangero, T. Calarco and A. Alberti
    Demonstration of quantum brachistochrones between distant states of an atom, arXiv, (2020)arXivBibTeXPDF

    Transforming an initial quantum state into a target state through the fastest possible route—a quantum brachistochrone—is a fundamental challenge for many technologies based on quantum mechanics. Here, we demonstrate fast coherent transport of an atomic wave packet over a distance of 15 times its size—a paradigmatic case of quantum processes where the target state cannot be reached through a local transformation. Our measurements of the transport fidelity reveal the existence of a minimum duration—a quantum speed limit—for the coherent splitting and recombination of matter waves. We obtain physical insight into this limit by relying on a geometric interpretation of quantum state dynamics. These results shed light upon a fundamental limit of quantum state dynamics and are expected to find relevant applications in quantum sensing and quantum computing.

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