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<p class="MsoNormal"><a name="_Hlk152055189"><b><span lang="EN-US">SmallTalk [about Nanoscience]<o:p></o:p></span></b></a></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk152055189"><span lang="EN-US"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk152055189"><b><span lang="EN-US">On Monday October 14th 2th
</span></b></span><span style="mso-bookmark:_Hlk152055189"><span lang="EN-US">at 15.00h we welcome you all to our SmallTalk seminar series. You are welcome to join us in lecture hall <b>Kollektorn, MC2 with fika</b> or on zoom.<o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk152055189"><span lang="EN-US">Our speaker is
<b>Finja Tietjen, </b>Doctoral Student, Condensed Matter and Materials Theory, Physics. The seminar is titled "Ultrafast Entropy Production by Magnons".
<b><o:p></o:p></b></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk152055189"><span lang="EN-US"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk152055189"><b><span lang="EN-US">Abstract:<o:p></o:p></span></b></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk152055189"><span lang="EN-US">Modern technology demands rapid nanoscale material manipulation, highlighting the need to understand non-equilibrium behavior on fundamental scales. While thermodynamic principles
have shaped macroscopic machines, translating them to the (sub)picosecond timescale of material excitations drives the emergent field of ultrafast thermodynamics. This talk shows an example of the successful application of thermodynamics to ultrafast phenomena
– the definition of entropy production by magnetic degrees of freedom in pump-probe experiments. In our theoretical approach, we consider a ferromagnet excited by a terahertz laser, which we can describe with the stochastic Langevin equation. Using tools from
stochastic thermodynamics, we define entropy production and estimate the heat production by magnetic degrees of freedom. In addition, we simulate the dependency of the magnetization dynamics and therefore entropy production on the pump laser. This allows us
to predict and guide experiments and further development of nanotechnology which includes magnetic degrees of freedom. <o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk152055189"><span lang="EN-US"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk152055189"><span lang="EN-US">Looking forward to seeing you live or on Zoom:
</span></span><a href="https://chalmers.zoom.us/j/61929604403#success"><span style="mso-bookmark:_Hlk152055189"><span lang="EN-US">https://chalmers.zoom.us/j/61929604403#success</span></span><span style="mso-bookmark:_Hlk152055189"></span></a><span style="mso-bookmark:_Hlk152055189">
</span><span style="mso-bookmark:_Hlk152055189"><span lang="EN-US"><o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk152055189"><span lang="EN-US"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk152055189"><span lang="EN-US">Best regards, <o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk152055189"><span lang="EN-US">Angela, Nils, Christoph, and Janine</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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