Simulation-based inference with Swyft

23 Jan 2023, 12:30 → 26 Jan 2023, 14:00 Europe/Amsterdam

B0.203 (University of Amsterdam)

Christoph Weniger (University of Amsterdam), James Alvey (University of Amsterdam), Noemi Anau Montel (GRAPPA)

Objective

The goal of this in-person workshop is to make progress in tackling the most difficult* parameter inference problems using state-of-the-art simulation-based inference techniques as implemented in Swyft**.

*Difficult = slow simulator/model; dozens, thousands or millions of parameters; complex posterior; unknown optimal summary statistics; ...

**Swyft is a pytorch-lightning-based implementation of truncated marginal neural ratio estimation (TMNRE), which is now successfully used for a diverse set of inference problems.

 

Swyft in action

Further information

The workshop is planned to be in-person. If you are interested to join online, please let us know. Depending on demand, we might change part of the workshop to a hybrid version.

 

Monday, 23 January

12:30 → 13:00 Welcome coffee

13:00 → 14:15 Lecture session: Basics - Motivation & Introduction to neural ratio estimation

Google Drive - Lecture Slides

14:15 → 15:00 Crash-course session

Google Colab Notebooks

15:00 → 15:30 Coffee break

15:30 → 16:45 Lecture session: Accuracy - Data summaries & validation

Google Drive - Lecture Slides

16:45 → 17:30 Crash-course session

Google Colab Notebooks

17:30 → 19:00 Welcome borrel

Tuesday, 24 January

09:00 → 10:30 Lecture session: Precision 1 - Sequential inference, truncation & the typical set

Google Drive - Lecture Slides

10:30 → 11:20 Crash-course session

Google Colab Notebooks

11:20 → 11:40 Coffe break

11:40 → 12:30 Existing applications

Convener: Noemi Anau Montel (GRAPPA)

11:40 Analysing stellar streams with Swyft

Speaker: James Alvey (University of Amsterdam)

Stellar Streams - Swyft Workshop.pdf

12:05 Swyft for Cosmological N-body simulations

Speaker: Androniki Dimitriou (IFIC, Valencia)

Androniki_amsterdam_swyft_workshop.pdf

12:30 → 14:00 Lunch break

14:00 → 14:25 Method session

Convener: James Alvey (University of Amsterdam)

14:00 Diffusion models and N-body simulations

Speaker: Camila Correa (UvA)

SWYFTcon_talk.pdf

14:25 → 14:50 New applications

Convener: James Alvey (University of Amsterdam)

14:25 Current Nested Sampling methods for Gravitational Lens Modelling

Speaker: Samuel Lange (Durham University)

SWYFT_Lange.pptx.pdf

14:50 → 15:15 Existing applications

Convener: James Alvey (University of Amsterdam)

14:50 Studying strong lensing images with Swyft

Speaker: Noemi Anau Montel (GRAPPA)

NoemiAnauMontel_SwyftForLensing.key

15:15 → 15:45 Coffee break

15:45 → 16:10 New applications

Convener: Camila Correa (UvA)

15:45 Shedding light on low-mass subhalo survival and annihilation luminosity with numerical simulations

Speaker: Alejandra Aguirre-Santaella (Instituto de Física Teórica UAM-CSIC)

Aguirre-Santaella-survival-swyftjan.pptx

16:10 → 16:35 Existing applications

Convener: Camila Correa (UvA)

16:10 GW parameter inference with Swyft

Speaker: Uddipta Bhardwaj (GRAPPA, University of Amsterdam)

UddiptaBhardwaj.key

16:35 → 17:30 Discussion session

Wednesday, 25 January

09:00 → 10:30 Lecture session: Precision 2 - Network architectures, noise resampling

Google Drive - Lecture Slides

10:30 → 11:20 Crash-course session

Google Colab Notebooks

11:20 → 11:40 Coffe Break

11:40 → 12:05 Method session

Convener: Will Handley (University Of Cambridge)

11:40 An overview of Simulation-based Inference methods and software

Speaker: Benjamin Miller (University of Amsterdam)

2023.01.25 - basics and other options - swyft workshop.pdf

12:05 → 12:30 Existing applications

Convener: Will Handley (University Of Cambridge)

12:05 SN Ia cosmology with TMNRE

Speaker: Konstantin Karchev (SISSA / GRAPPA)

kosio-snwyfty.pdf

12:30 → 14:00 Lunch break

14:00 → 14:50 New applications

Convener: Guillermo Franco Abellán (Gravitation AstroParticle Physics Amsterdam)

14:00 Analysing the Fermi Galactic Center Excess with Machine Learning

Speaker: Florian List (University of Vienna)

Swyft_GCE_Florian_List.pdf

14:25 Millisecond pulsars in globular clusters

Speaker: Joanna Berteaud (LAPTh (CNRS/USMB))

Berteaud_swyft_workshop.pdf

14:50 → 15:15 Existing applications

Convener: Guillermo Franco Abellán (Gravitation AstroParticle Physics Amsterdam)

14:50 Dissecting the Galactic and extragalactic GeV gamma-ray sky with simulation-based inference

Speaker: Christopher Eckner (LAPP, CNRS)

SwyftWorkshop_Amsterdam_23-26Jan2023.pdf

15:15 → 15:45 Coffee break

15:45 → 16:10 New applications

Convener: Guillermo Franco Abellán (Gravitation AstroParticle Physics Amsterdam)

15:45 Simulation-based inference for axions at colliders

Speaker: Alessandro Morandini (KIT, IAP)

Axion_SBI.pdf

16:10 → 17:30 Discussion session

19:00 → 22:00 Workshop dinner

Thursday, 26 January

09:00 → 09:50 Method session

Convener: Christopher Eckner (LAPP, CNRS)

09:00 High-dimensional nested sampling

Speaker: Will Handley (University Of Cambridge)

will_handley_amsterdam_lfi_2023.pdf

09:25 High-dimensional prior truncation

Speaker: Kilian Scheutwinkel (University of Cambridge)

swyft_talk_KHScheutwinkel.pdf

09:50 → 10:50 New applications

Convener: Christopher Eckner (LAPP, CNRS)

09:50 The future of cosmology with Euclid: hopes & challenges

Speakers: Guadalupe Cañas-Herrera (European Space Research and Technology Centre/European Space Agency), Matteo Martinelli (INAF - Osservatorio Astronomico di Roma), Stéphane Ilic (IJCLab, Orsay, France)

Swyft_Euclid.pdf

10:50 → 11:30 Discussion session

11:30 → 11:50 Coffee break

11:50 → 12:30 Discussion session: Outlook

12:30 → 14:00 Lunch break