[Astro] [CAPT] Particle Cosmology and Gravity Seminars this week

Tue Sep 24 12:10:20 BST 2024

A gentle reminder of today's seminar at 1 pm.

  1.
Speaker: Jeremy Wachter (Wentworth Institute of Technology, Boston)

            Seminar date: 24th  September, Tuesday, 1 pm

            Venue: Seminar Room A 113

             Title:  Numerical studies of gravitational self-evolution of cosmic string loops

Abstract: We present the results of large-scale numerical calculation of how realistic cosmic string loops evolve due to gravitational self-interaction. Initially kinky loops are smoothed, leading to a reduction in the gravitational wave power. However, smoothing never produces strong cusps. Gravitational self-interaction also causes the gravitational wave background from loops to be reduced, more strongly at higher frequencies. We comment on future detectability and other observable impacts, such as loop clustering in galaxies.

Links to join: 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

With Regards,
-Swagat

Swagat Saurav Mishra,

Postdoctoral Research Associate

Particle Cosmology Group,

Centre for Astronomy and Particle Theory,

University of Nottingham, Nottingham NG7 2RD, UK.

Website: https://swagatam18.wordpress.com/

Research Link:https://inspirehep.net/authors/1517353

________________________________
From: Particles <particles-bounces at lists.nottingham.ac.uk> on behalf of Swagat Mishra <Swagat.Mishra at nottingham.ac.uk>
Sent: 23 September 2024 01:04
To: capt at nottingham.ac.uk <capt at nottingham.ac.uk>; maths-quantum-gravity-group at lists.nottingham.ac.uk <maths-quantum-gravity-group at lists.nottingham.ac.uk>; O365-Gravity Laboratory <o365-gravitylaboratory at UniofNottm.onmicrosoft.com>
Cc: Ella Batchelor (staff) <ppzeb1 at exmail.nottingham.ac.uk>; Käding, Christian <christian.kaeding at tuwien.ac.at>; joonas.o.hirvonen at helsinki.fi <joonas.o.hirvonen at helsinki.fi>; Wachter, Jeremy <wachterj at wit.edu>; Bobby Acharya <bacharya at ictp.it>; Drande Patogu <ppydp10 at exmail.nottingham.ac.uk>
Subject: [Particles] [CAPT] Particle Cosmology and Gravity Seminars this week

Dear All,
                    This week, we will be hosting two seminars (one on Tuesday and one on Thursday). In the following, I provide the details of seminars for this week, as well as a list of upcoming seminars for the term.

Week: 23/09/2024 - 27/09/2024
-----------------------------------------

  1.
Speaker: Jeremy Wachter (Wentworth Institute of Technology, Boston)  (Online Seminar)

            Seminar date: 24th  September, Tuesday, 1 pm

            Venue: Seminar Room A 113

             Title:  Numerical studies of gravitational self-evolution of cosmic string loops

Abstract: We present the results of large-scale numerical calculation of how realistic cosmic string loops evolve due to gravitational self-interaction. Initially kinky loops are smoothed, leading to a reduction in the gravitational wave power. However, smoothing never produces strong cusps. Gravitational self-interaction also causes the gravitational wave background from loops to be reduced, more strongly at higher frequencies. We comment on future detectability and other observable impacts, such as loop clustering in galaxies.

  1.
Speaker: Christian Kading (TU Wien, Vienna) visiting Clare Burrage

            Seminar date: 26th  September, Thursday, 3 pm

           Venue: Seminar Room A 113

            Title:  New paths in the search for light scalar fields
Abstract: The existence of additional light scalar fields in nature is predicted by many theories in modern physics. In particular, light scalar fields are suggested to play a variety of roles in cosmology and astrophysics. For example, they are frequently considered as candidates for dark matter or dark energy. Consequently, there are continuing experimental and theoretical efforts in searching for light scalar fields. In this talk, we will look at chameleons, symmetrons, and environment-dependent dilatons as prominent examples of so-called screened scalar fields. We will theoretically discuss the use of (open) quantum dynamics and finite-temperature effects as new ways of probing such models. In particular, we will show that some of these previously untaken paths have the potential to put tighter constraints on the parameter spaces of light scalar fields.

Links to join: 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
[cid:91ac0da5-5a16-49a6-b9ba-1a17ab11ec93]<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>
Join conversation<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>
teams.microsoft.com

A list of upcoming seminars for this term (with rough titles)

  *
01 Oct | Dibya Chakraborty (Indian Institute of Technology, Madras) | String Cosmology
  *
08 Oct | Theo Anton (QMUL) | Modified Gravity
  *
10 Oct | Kieran Wood (Nottingham) | Multi-metric gravity and Gregory-Leflamme instability (Journal Club time)
  *
15 Oct | Eemeli Tomberg (Lancaster U) | Compaction function for Primordial Black Holes
  *
22 Oct | Ayngaran Thavanesan (DAMTP Cambridge) | Cosmological CPT theorem
  *
29 Oct | Santiago Agui Salcedo (DAMTP Cambridge) | Open EFT for inflation
  *
05 Nov | Yuyu Mo (Edinburgh Higgs Centre) | Bootstrap
  *
12 Nov | Alex Jenkins (UCL) | Quantum Matter, Analogue Gravity
  *
19 Nov |  Bjoern Friedrich (Heidelberg) | String Phenomenology
  *
26 Nov | Tamara Evstafyeva (DAMTP Cambridge) | Gravitational Waves
  *
03 Dec | Emma Albertini (Imperial College London) | Gravity, Scattering Amplitudes
  *
10 Dec | TBD

With Regards,
-Swagat

Swagat Saurav Mishra,

Postdoctoral Research Associate

Particle Cosmology Group,

Centre for Astronomy and Particle Theory,

University of Nottingham, Nottingham NG7 2RD, UK.

Website: https://swagatam18.wordpress.com/

Research Link:https://inspirehep.net/authors/1517353

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