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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>Från:</b> Jérémy Vachier<br>
<b>Skickat:</b> den 25 april 2022 10:31<br>
<b>Till:</b> postdocs@nordita.org; students@nordita.org; okc-all@albanova.se; condmat@physics.kth.se<br>
<b>Ämne:</b> Scientific Fika – Friday April 29th 4:00pm Hybrid Room Mega – Luca “Are 2 derivatives enough to describe Nature at a fundamental level?”</font>
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<font face="Liberation Serif, serif"><font style="font-size:14pt" size="4"><font color="#000000">Dear Juniors,</font><br>
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<font color="#000000">It is a great pleasure to announce that </font><font color="#000000">on</font><font color="#000000">
</font><font color="#000000"><b>Friday, April</b></font><font color="#000000"> </font>
<font color="#000000"><b>29th</b></font><font color="#000000"> </font><font color="#000000"><b>at 4:00pm</b></font><font color="#000000"><span style="font-weight:normal">,
</span></font><font color="#000000"><span style="font-weight:normal">Luca</span></font><font color="#000000">
</font><font color="#000000"><span style="font-weight:normal">will talk about “Are 2 derivatives enough to describe Nature at a fundamental level?”.</span></font></font></font><br>
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<font face="Liberation Serif, serif"><font style="font-size:14pt" size="4"><b>Abstract: </b>The aim of this talk is to address the question posed in the title by inspecting in depth the role of higher-order derivatives in the description of physical laws of
Nature. We discuss why it is usually sufficient to work with 1st and 2nd derivatives, but also why and when it is necessary to consider derivatives of a higher order. We go through several examples of known physical phenomena described in terms of differential
equations of order higher than 2. We range from Newtonian mechanics and electromagnetism, to quantum field theories of high-energy interactions, and discriminate between “fundamental” and “non-fundamental” higher-derivative equations. We will argue that, unlike
other interactions, a consistent quantum description of gravity at high energy necessarily requires higher-order derivatives to be fundamental. This could suggest that 2 derivatives are not enough to describe Nature at a fundamental level.</font></font><br>
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<font color="#000000"><font face="Liberation Serif, serif"><font style="font-size:14pt" size="4">Please put this date in your calendar and come to discuss interesting science.</font></font></font><font face="Liberation Serif,
serif"><font style="font-size:14pt" size="4"><br>
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</font></font><font color="#000000"><font face="Liberation Serif,
serif"><font style="font-size:14pt" size="4">Zoom link:<br>
<a href="https://stockholmuniversity.zoom.us/j/68149127828" class="moz-txt-link-freetext" id="LPlnk474487" previewremoved="true">https://stockholmuniversity.zoom.us/j/68149127828</a>
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<a id="LPUrlAnchor_16508759245290.43520436103969584" style="text-decoration: none;" href="https://stockholmuniversity.zoom.us/j/68149127828" target="_blank">Launch Meeting - Zoom</a></div>
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stockholmuniversity.zoom.us</div>
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<font color="#000000"><font face="Liberation Serif, serif"><font style="font-size:14pt" size="4">Place: NORDITA Floor 6 - Room Mega
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<font color="#000000">Have a nice day,</font><br>
<font color="#000000">Best regards,</font><br>
<font color="#000000">Nadia, Jeremy and Guilherme</font></font></font><br>
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