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Dear All,</div>
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<span style="line-height: 1.38;">We have a seminar this week, whose details are provided below - </span></div>
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<b>Speaker: Mariana Carrillo Gonzalez</b> (Imperial/Southampton)</div>
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<b>Seminar date:</b> <b>2nd Jun, Tuesday, 1 pm </b>UK time</div>
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<b>Venue:</b> <b>C12</b> <b>(Physics Building)</b></div>
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<b>Title: (A)dS Double Copy in Twistor Space</b></div>
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<b>Abstract</b>: </div>
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The double copy, which relates gravity to the square of Yang–Mills theory, is usually studied in flat spacetime and is known to hold both for scattering amplitudes and for classical field configurations. In this talk, I will present a new approach that extends
these results to maximally symmetric curved spacetimes. The new relations are formulated in twistor space, a complex projective space that encodes solutions to the equations of motion as holomorphic data. First, I will discuss the case of AdS₃, where a double
copy structure for bulk to boundary correlators and black hole solutions naturally arises in minitwistor space. Then, I will show how in (A)dS₄ one can construct bulk correlation functions using only twistors, dual twistors, and the infinity twistor as building
blocks. The relation to coordinate space arises via nested Penrose transforms. The boundary limit of these correlators yields CFT correlators / wavefunction coefficients that satisfy the expected Ward identities and obey a simple double copy relation.</div>
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<b>Link to join:</b></div>
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<span style="color: black;"> </span><span style="color: rgb(5, 99, 193);"><a href="https://teams.microsoft.com/l/meetup-join/19%3ameeting_OGM3OTk5NzQtZWEwZS00ZmUyLTk3MGUtZjFhY2M5OTU2MjI1%40thread.v2/0?context=%7b%22Tid%22%3a%2267bda7ee-fd80-41ef-ac91-358418290a1e%22%2c%22Oid%22%3a%22f3250584-4b5f-48fa-a897-08e77f2246b7%22%7d" target="_blank" id="OWAad6d8bef-1f87-f4a3-2cfa-f0a2c8e845d2" class="x_OWAAutoLink" title="https://teams.microsoft.com/l/meetup-join/19%3ameeting_OGM3OTk5NzQtZWEwZS00ZmUyLTk3MGUtZjFhY2M5OTU2MjI1%40thread.v2/0?context=%7b%22Tid%22%3a%2267bda7ee-fd80-41ef-ac91-358418290a1e%22%2c%22Oid%22%3a%22f3250584-4b5f-48fa-a897-08e77f2246b7%22%7d" rel="noopener noreferrer" data-auth="NotApplicable" data-linkindex="0" style="color: rgb(5, 99, 193); margin: 0px;"><u>https://teams.microsoft.com/l/meetup-join/19%3ameeting_OGM3OTk5NzQtZWEwZS00ZmUyLTk3MGUtZjFhY2M5OTU2MjI1%40thread.v2/0?context=%7b%22Tid%22%3a%2267bda7ee-fd80-41ef-ac91-358418290a1e%22%2c%22Oid%22%3a%22f3250584-4b5f-48fa-a897-08e77f2246b7%22%7d</u></a></span></div>
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<b><i>List of the following upcoming seminars (not everyone has given us a title yet):</i></b></div>
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9-Jun <b>Sayyed Farbod Rassouli</b> (Nottingham)</div>
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16-Jun <b>Carlos Garcia-Garcia</b> (Waterloo,Canada) The status of single scalar field dark energy</div>
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<b>Finally the full list can be found here:</b></div>
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<a href="https://www.nottingham.ac.uk/physics/research/particle-cosmology/seminars/seminars.aspx" target="_blank" id="OWA70d9ece4-0062-83e2-1e4a-e99da51df553" class="x_OWAAutoLink" title="https://www.nottingham.ac.uk/physics/research/particle-cosmology/seminars/seminars.aspx" rel="noopener noreferrer" data-auth="NotApplicable" data-linkindex="1" style="margin: 0px;">https://www.nottingham.ac.uk/physics/research/particle-cosmology/seminars/seminars.aspx</a></div>
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Please let us know if you would like to chat with the speaker and we will arrange for that. </div>
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Best wishes,</div>
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Ed and Qi-Xin</div>
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