Theoretical Cosmology meetings

To actively encourage the field of theoretical cosmology and to set an informal stage for the exchange of ideas, the Dutch theoretical cosmology community organizes Friday afternoon meetings approximately 6 times a year — usually on the first Friday of the month. The meetings typically start in the afternoon with a main speaker, followed by a short break to continue with another seminar or journal club discussion on some topic of current interest. We end the afternoon with drinks. The supporting institutes in Leiden, Amsterdam, Groningen, Utrecht where recently joined by the strings and cosmology group in Leuven and take turns in hosting the event.

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November 2016

Utrecht Fall 2016

04/11/2016 @ 12:00 - 18:00
Institute for Theoretical Physics Utrecht,
Princetonplein 5
Utrecht, 3584 CE Netherlands
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Utrecht, November 4, 2016 Place: Universiteit Utrecht, Buys Ballot Gebouw, room 712 For this meeting we will have two external speakers 14:00-15:00 Talk by Jose Espinosa (IFAE & ICREA Barcelona, Spain) Title: Higgs inflation as a mirage Abstract: After reviewing the nice properties of Higgs inflation and some of its problems, I will discuss a simple unitarization of the scenario that is genuinely…

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December 2016

Groningen Winter 2016

02/12/2016 @ 12:00 - 18:00
Groningen University College,
Hoendiepskade 23
Groningen, 9718BG Netherlands
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11:30-12:30 Talk by Timm Wrase (TU Vienna)
Title: dS vacua and inflation in supergravity

14:00-15:00 Talk by Gui Pimentel (UvA Amsterdam)
Title: Symmetries of Cosmological Fluctuations

15:30-16:30 Talk by David Stefanyszyn (RUG Groningen)
Title: TBA

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February 2017

Leiden Winter 2017

February 3 @ 12:00 - 18:00
Institute Lorentz Leiden,
Niels Bohrweg 2
Leiden, 2333 CA Netherlands
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Leiden University, February 3, 2017 Casimir room (Oort building, Room 276, the Institute Lorentz coffee room) 14:00-15:00 Talk by J. Magueijo (Imperial College) Title: The critical geometry of a thermal Big Bang Abstract: We explore the space of scalar-tensor theories containing two non-conformal metrics, and find a discontinuity pointing to a “critical” cosmological solution. Due to the different maximal speeds…

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March 2017

Amsterdam UvA Spring 2017

March 3 @ 12:00 - 18:00
Institute of Physics Amsterdam,
Science Park 904
Amsterdam, 1098 XH Netherlands
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UvA Amsterdam, March 3, 2017 The meeting will take place in room C0.05 in the Science Park. 14:15-15:15 Talk by Jaume Garriga (Barcelona) Title: Primordial black holes from cosmic inflation 15:15 – 15:45 Coffee 15:45-16:45 Talk by Marjorie Schillo (Leuven) Title: A new top-down model of inflation Abstract: I will present recent work that has succeeded in embedding the mechanism…

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April 2017

Leuven Spring 2017

April 7 @ 12:00 - 18:00
KU Leuven,
Kardinaal Mercierlaan 94
Leuven, 3001 Belgium
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KU Leuven, April 7, 2017 Location: Arenberg Castle, Kardinaal Mercierlaan 94, 3001 Leuven (Heverlee) For organisational reasons (such as pre-meeting lunch and bus), please sign up for the meeting by clicking “I am coming” here: https://beta.doodle.com/poll/uaza39w2raxwafr2 Schedule 13.00-14.00 Talk by Kate Eckerle (Columbia University, USA) Title: Axions of Evil – a novel type of alignment that renders complex theories tractable…

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June 2017

Utrecht Summer 2017: Joint Cosmology & Holography

June 2 @ 14:00 - 18:00
Institute for Theoretical Physics Utrecht,
Princetonplein 5
Utrecht, 3584 CE Netherlands
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Utrecht on Friday, June 2, 2017 Location: Atlas Lecture Hall, Koningsberger Building, Utrecht Science Park Schedule 13:30 – 14:00 Tea & Coffee 14:00 – 15:00 Talk by Brando Bellazzini (IPhT CEA Saclay) Title: Softness, amplitudes’ positivity, and EFT for spinning particles. Abstract: Not every EFT admits a UV completion which is consistent with S-matrix theory. I will review some of the…

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July 2017

Lorentz Center Workshop: Theoretical Approaches to Cosmic Acceleration

July 3 - July 7

Lorentz Center Workshop: Theoretical Approaches to Cosmic Acceleration Connecting String, Supergravity and Quantum Field Theory Aspects of (Near-) De Sitter Space from 3 Jul 2017 through 7 Jul 2017 Venue: Leiden, Lorentz Center@Oort Link to the program and registration: https://www.lorentzcenter.nl/lc/web/2017/913/info.php3?wsid=913&venue=Oort Scientific organizers: Ana Achúcarro (Leiden, The Netherlands) Renata Kallosh (Stanford, CA, USA) Andrei Linde (Stanford, CA, USA) Diederik Roest (Groningen, The Netherlands)…

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October 2017

Leiden Fall 2017

October 6 @ 14:00 - 17:00
Institute Lorentz Leiden,
Niels Bohrweg 2
Leiden, 2333 CA Netherlands
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Leiden, October 6h, 2017 The meeting will take place in the Casimir room, Oort 276, Institute Lorenz coffee room. 14:00-15:00 Talk by Kepa Sousa (IFT Madrid) Title: Supertranslations at black hole horizons and gauge redundancies Abstract:  Classical “no-hair theorems” state that stationary black holes in Einstein-Maxwell theory are characterised by their mass, angular momentum and electric charge. Hawking et al.…

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November 2017

Amsterdam Fall 2017

November 10 @ 14:00 - 17:00
NIKHEF,
Science Park 105
Amsterdam, 1098 XG
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Amsterdam, November 10th, 2017 The meeting will take place at Nikhef in room H331. 14:00-15:00 Talk by William Cottrell (UvA) Title: Weak Gravity Constraints in Inflation Abstract: In this talk I will summarize constraints that the axionic form of the Weak Gravity Conjecture places on inflation models and attempts to circumvent these constraints. I will also discuss applications of the…

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December 2017

Utrecht Fall 2017

December 1 @ 14:00 - 17:00
Institute for Theoretical Physics Utrecht,
Princetonplein 5
Utrecht, 3584 CE Netherlands
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Utrecht, December 1st, 2017 The meeting will take place at Utrecht University, Buys Ballot building (BBG) in room BBG 065. 14:00-15:00 Talk by Yvette Welling (Leiden University) Title: Scaling symmetry & hyperbolic field space in inflation Abstract: We explore different corners of the parameter space of inflation with multiple fields. In all cases we find quite counterintuitive phenomenology. First, we…

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