<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:"MS Mincho";
panose-1:2 2 6 9 4 2 5 8 3 4;}
@font-face
{font-family:"MS Gothic";
panose-1:2 11 6 9 7 2 5 8 2 4;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Aptos;}
@font-face
{font-family:Georgia;
panose-1:2 4 5 2 5 4 5 2 3 3;}
@font-face
{font-family:"\@MS Gothic";
panose-1:2 11 6 9 7 2 5 8 2 4;}
@font-face
{font-family:"\@MS Mincho";
panose-1:2 2 6 9 4 2 5 8 3 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
font-size:11.0pt;
font-family:"Aptos",sans-serif;
mso-ligatures:standardcontextual;
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#467886;
text-decoration:underline;}
p.xxelementtoproof, li.xxelementtoproof, div.xxelementtoproof
{mso-style-name:x_xelementtoproof;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:12.0pt;
font-family:"Aptos",sans-serif;}
p.xxxmsonormal, li.xxxmsonormal, div.xxxmsonormal
{mso-style-name:x_xxmsonormal;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:12.0pt;
font-family:"Aptos",sans-serif;}
p.xxmsonormal, li.xxmsonormal, div.xxmsonormal
{mso-style-name:x_xmsonormal;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:12.0pt;
font-family:"Aptos",sans-serif;}
span.EmailStyle21
{mso-style-type:personal-compose;
font-family:"Aptos",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:11.0pt;
mso-ligatures:none;
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-GB" link="#467886" vlink="#96607D" style="word-wrap:break-word">
<div class="WordSection1">
<p class="xxelementtoproof" style="margin:0cm;background:white"><b><span style="font-size:16.0pt;color:black">Tuesdays at 11am, CAPT Foyer – Astro Coffee<br>
<br>
Tuesdays at 11.30am, A113 CAPT – Astronomy Journal Club</span></b><o:p></o:p></p>
<p class="xxelementtoproof" style="margin:0cm;background:white"><b><span style="font-size:16.0pt;color:black"> </span></b><o:p></o:p></p>
<p class="xxelementtoproof" style="margin:0cm;background:white"><b><span style="font-size:16.0pt;color:black">Tuesday 26<sup>th</sup> May at 1pm, C12 Physics – Particle Cosmology and Gravity Seminar</span></b><o:p></o:p></p>
<p class="xxxmsonormal" style="margin:0cm"><span style="font-size:16.0pt">Job Feldbrugge (Edinburgh)<o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:14.0pt;color:black;mso-ligatures:none;mso-fareast-language:EN-GB">Real-Time Path Integrals, Caustics and Interference in Cosmology<o:p></o:p></span></i></p>
<p class="xxxmsonormal" style="margin:0cm"><span style="font-size:16.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">Interference is one of the most universal phenomena in nature, as exemplified by the real-time Feynman path integral. Despite the ubiquity of interference patterns, their evaluation has often proven challenging.
This is especially apparent when considering lensing in astrophysics in the wave optics regime and when studying quantum cosmology using the path integral for gravity. The oscillatory integrals involved are frequently conditionally convergent, converge slowly,
and artefacts such as dependence on unphysical cut-offs can be difficult to avoid. Traditionally, these oscillatory integrals are approximated with saddle point methods. However, determining which saddle points to include can be a tricky exercise.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">Using Picard-Lefschetz theory — a general, exact method for handling multidimensional oscillatory integrals — I will present an unambiguous definition of the real-time path integral and an efficient numerical method
for its evaluation. I will show that we can unambiguously identify the relevant instantons using resurgence theory. By going beyond the WKB approximation, we obtain asymptotic series whose interrelations enable us to detect which instantons contribute to the
path integral. The resulting propagator consists of an interference pattern governed by the caustics of the underlying classical system. These methods pave the way to the study of real-time dynamical systems in our quantum Universe. <o:p></o:p></span></p>
<p class="xxelementtoproof" style="margin:0cm;background:white"><b><span style="color:black"> </span></b><o:p></o:p></p>
<p class="xxelementtoproof" style="margin:0cm;background:white"><b><span style="color:black">Link to join:</span></b><span style="color:black"> </span><span style="color:#467886"><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" 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">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</a></span><span style="color:black"><br>
</span><span style="font-size:16.0pt;color:black">---</span><o:p></o:p></p>
<p class="xxelementtoproof" style="margin:0cm;background:white"><b><span style="font-size:16.0pt;color:black">Thursday 28<sup>th</sup> May at 1pm, A113 CAPT – Astronomy Lunch Talk</span></b><o:p></o:p></p>
<p class="xxxmsonormal" style="margin:0cm"><span style="font-size:16.0pt">James Rice<o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:14.0pt;color:black;mso-ligatures:none;mso-fareast-language:EN-GB">The Fate of the Cold ISM in COLIBRE Cluster Satellites<o:p></o:p></span></i></p>
<p class="xxxmsonormal" style="margin:0cm"><span style="font-size:16.0pt"><o:p> </o:p></span></p>
<p class="xxxmsonormal" style="margin:0cm"><span style="font-size:11.0pt;color:black;mso-ligatures:standardcontextual;mso-fareast-language:EN-US">The fate of hot, tenuous HI in cluster satellites is uncontroversial, being rapidly depleted by environmental effects
such as ram pressure stripping. The evolution of the cold, dense phase of the ISM in which star-forming H2 is predominant is less clear, with both deficient and H2-rich satellite samples having been found in observation. We compare the cluster satellite data
of the cutting-edge COLIBRE suite of simulations to a subset of recent (past decade) CO surveys up to z ~ 1.6, before delving into COLIBRE’s independent predictions for the effects of the cluster environment on satellites and nearby centrals, and how this
is affected by the orbital and infall history of the galaxies in question.<o:p></o:p></span></p>
<p class="xxxmsonormal" style="margin:0cm"><span style="font-size:16.0pt"> </span><o:p></o:p></p>
<p class="xxelementtoproof" style="margin:0cm;background:white"><b><span style="font-size:16.0pt;color:black">Thursdays at 3pm, A113 CAPT – Particle Cosmology Journal Club</span></b><o:p></o:p></p>
<p class="xxxmsonormal" style="margin:0cm"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">---</span><o:p></o:p></p>
<p class="xxmsonormal" style="margin:0cm"><b><span style="font-size:16.0pt">Fridays at 4pm, CAPT Foyer – CAPT Cakes</span></b><o:p></o:p></p>
<p class="xxmsonormal" style="margin:0cm"><span style="font-size:11.0pt">---</span><o:p></o:p></p>
<p class="xxmsonormal" style="margin:0cm">If you have any events/visitors you would like included in next week’s bulletin, please let me know.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Best wishes</span><span style="mso-ligatures:none;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:6.0pt;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-GB">Ella<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:6.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-family:"Arial",sans-serif;color:#009BBD;mso-fareast-language:EN-GB">Ella Batchelor
</span></b><span style="font-family:"Arial",sans-serif;color:#009BBD;mso-fareast-language:EN-GB">(she/her)</span><o:p></o:p></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-family:"Arial",sans-serif;color:#0F1245;mso-fareast-language:EN-GB">Administrator</span></b><span style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-family:"Arial",sans-serif;color:#0F1245;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0F1245;mso-fareast-language:EN-GB">School of Physics & Astronomy</span><span lang="ZH-CN" style="font-size:9.0pt;font-family:"MS Gothic";color:#0F1245;mso-fareast-language:ZH-CN">
</span><span lang="EN-US" style="font-size:9.0pt;font-family:"MS Mincho";color:#0F1245;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0F1245;mso-fareast-language:EN-GB">University of Nottingham</span><span lang="EN-US" style="font-size:9.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0F1245;mso-fareast-language:EN-GB">A112a Centre for Astronomy & Particle Theory</span><span lang="EN-US" style="font-size:9.0pt;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0F1245;mso-fareast-language:EN-GB">University Park</span><span lang="EN-US" style="font-size:9.0pt;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0F1245;mso-fareast-language:EN-GB">Nottingham, NG7 2RD</span><span lang="EN-US" style="font-size:9.0pt;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:9.0pt;mso-fareast-language:EN-GB"> <o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0F1245;mso-fareast-language:EN-GB">+44 (0) 115 74 86778<b> </b></span><b><span lang="EN-US" style="font-size:9.0pt;color:#0F1245;mso-fareast-language:EN-GB">| </span></b><b><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0F1245;mso-fareast-language:EN-GB">
</span></b><a href="http://nottingham.ac.uk/"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:blue;mso-fareast-language:EN-GB">nottingham.ac.uk</span></a><span style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="mso-ligatures:none;mso-fareast-language:EN-GB"><img border="0" width="484" height="109" style="width:5.0416in;height:1.1354in" id="Picture_x0020_2042549853" src="cid:image001.png@01DCE9C5.64079580"></span><span lang="EN-US" style="font-size:9.0pt;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><b><span lang="EN-US" style="font-size:9.0pt;font-family:"Georgia",serif;color:#15769E;mso-fareast-language:EN-GB">Follow us</span></b><span lang="EN-US" style="font-size:9.0pt;color:#191919;mso-fareast-language:EN-GB"><br>
</span><a href="http://facebook.com/TheUniofNottingham"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0000E9;mso-fareast-language:EN-GB">facebook.com/uniofnottingham</span></a><span lang="EN-US" style="font-size:9.0pt;color:#191919;mso-fareast-language:EN-GB"><br>
</span><a href="http://twitter.com/UniofNottingham"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0000E9;mso-fareast-language:EN-GB">twitter.com/uniofnottingham</span></a><span lang="EN-US" style="font-size:9.0pt;color:#191919;mso-fareast-language:EN-GB"><br>
</span><a href="http://youtube.com/nottmuniversity"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0000E9;mso-fareast-language:EN-GB">youtube.com/nottmuniversity</span></a><span lang="EN-US" style="font-size:9.0pt;color:#191919;mso-fareast-language:EN-GB"><br>
</span><a href="http://instagram.com/uniofnottingham"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0000E9;mso-fareast-language:EN-GB">instagram.com/uniofnottingham</span></a><span lang="EN-US" style="font-size:9.0pt;color:#191919;mso-fareast-language:EN-GB"><br>
</span><a href="http://linkedin.com/company/university-of-nottingham"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0000E9;mso-fareast-language:EN-GB">linkedin.com/company/university-of-nottingham</span></a><span lang="EN-US" style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:#191919"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>