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<p class="MsoNormal"><span style="font-family:"Georgia","serif"">Please join us for the Condensed Matter Experiment Seminar presented by Ivar Martin, Argonne National Laboratory on Thursday, April 16<sup>th</sup> at 11:30am in the Smith Seminar Room (1080 PRB).
The title and abstract are listed below.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Georgia","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Georgia","serif"">If you are interested in meeting with the speaker during his visit, please contact Denis Pelekhov at
<a href="mailto:Pelekhov.1@osu.edu">Pelekhov.1@osu.edu</a> or by phone at 292-9125.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Georgia","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><b><i><span style="font-family:"Georgia","serif"">Dynamics of interacting disordered quantum spin systems”<o:p></o:p></span></i></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-family:"Georgia","serif""> <o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-family:"Georgia","serif""> </span></b><span style="font-family:"Georgia","serif"">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.</span><span style="font-family:"Georgia","serif""><o:p></o:p></span></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Georgia","serif"">Thank you,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Georgia","serif"">Trisch</span><span style="font-size:10.0pt;font-family:"Georgia","serif""><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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