Condensed Matter Seminar - Ivar Martin, Argonne National Laboratory - Thursday, April 16th - 11:30am, Smith Seminar Room (1080 PRB)

[Longbrake, Patricia]

Please join us for the Condensed Matter Experiment Seminar presented by Ivar Martin, Argonne National Laboratory on Thursday, April 16th at 11:30am in the Smith Seminar Room (1080 PRB).  The title and abstract are listed below.

If you are interested in meeting with the speaker during his visit, please contact Denis Pelekhov at Pelekhov.1 at osu.edu<mailto:Pelekhov.1 at osu.edu> or by phone at 292-9125.

Dynamics of interacting disordered quantum spin systems"

 Localized paramagnetic electrons are believed to be the cause of magnetic flux noise that plagues superconducting qubits, but how such interacting spins generate frequency dependent noise of the 1/f form is not well understood. I will describe a novel dynamical real space renormalization group (RG) procedure that is equipped to calculate directly various dynamical quantities in a strongly disordered Heisenberg spin system, including the `noise' from such systems. The dynamics correspond to anomalous ("sub")-diffusion, and for some initial disorder distributions approaches many body localized regime. I will also describe how the slow degrees of freedom generated by the RG can preserve quantum phase coherence for a long time and can possibly be used for quantum information storage.

Thank you,
Trisch

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