Name: Matthieu Schaller
Current position: Faculty
Affiliation: Lorentz Institute & Leiden Observatory
Field of research: Numerical simulations of the large-scale structure. Effect of baryons on cosmology probes.
What is your career trajectory to date?
BSc + MSc physics - EPFL, Lausanne Switzerland, 2006 - 2011
PhD student - Institute for Computational Cosmology, Durham UK, 2011-2015
PDRA - Institute for Computational Cosmology, Durham UK, 2016 - 2017
VENI Post-doctoral fellow - Leiden Observatory, Leiden NL, 2018 - 2020
University Lecturer - Lorentz Institute & Leiden Observatory, Leiden NL, 2021 - now
What are the most exciting open questions in your research area?
- Understanding galaxy formation well enough to constrain cosmology with late-time probes. - The role, nature, and evolution of primordial magnetic fields.
- The nature of dark matter.
What do you like and dislike about being a scientist?
I like the freedom to do what I want; the opportunities to meet amazing people and travel to exciting places. I also enjoy pushing the boundaries of what we understand as a community.
I dislike the time we spend dealing with proposal and application writing.
Which of your skills are you most proud of, or find most useful?
Scientifically: Skills related to parallel programming and ease of use of tools related to high-end high-performance computing.
Personally: Making a pretty decent chocolate mousse.
In your career so far, at what point were you the most excited, and what were you excited about?
The first time we completed a large simulation with our cosmological code.
What new skills would you like to learn in the next year?
Better knowledge of Dutch.
What advances or new results are you excited about or looking forward to?
- Measuring the mass of the neutrino particle from the LSS
- %-level measurement of the Hubble constant from GW standard sirens.
What is the biggest obstacle that is slowing down your research field right now?
The delays in the launch of the Euclid mission.
What role do you think a community network like EuCAPT can play in developing theoretical astroparticle physics and cosmology in Europe?
Providing networking opportunities mostly for early career scientists. Serve as a forum to exchange ideas.
What’s your favorite food?
Cheese fondue (with the perfect cheese mix that I am happy to point people towards).
Have you lived in a different European country than you do now? If so, would you like to tell us something about it, e.g. a fond memory or something you found surprising?
I was surprised by the amount of socializing and even work that takes place in pubs across England. Something I have learnt to embrace and would miss.
How do you like to relax after a hard day of work?
Go for a cycling tour through the fields.
If you were not a scientist, what do you think you would be doing?
Airline pilot.
What do you hope to see accomplished scientifically in the next 50 years?
- Actually usable quantum computers
- Unambiguous beyond standard model physics
- Nuclear fusion producing energy.
Name: Tania Robens
Current position: Faculty
Affiliation: Rudjer Boskovic Institute
Field of research: Particle physics at colliders
What are the most exciting open questions in your research area?
Is the scalar sector of the SM part of a larger extension? Can we learn something about phase transitions from collider measurements?
What do you like and dislike about being a scientist?
You always do what interests you. However, careers can be stony and e.g. family-unfriendly.
In your career so far, at what point were you the most excited, and what were you excited about?
Higgs discovery.
What new skills would you like to learn in the next year?
Better time management.
What is the biggest obstacle that is slowing down your research field right now?
Lack of funding.
If you were not a scientist, what do you think you would be doing?
Something in arts.
Name: Eemeli Tomberg
Current position: Postdoc
Affiliation: Laboratory of High Energy and Computational Physics, National Institute of Chemical Physics and Biophysics (NICPB, Tallinn)
Field of research: Theoretical early universe cosmology
What is your career trajectory to date?
I studied at the University of Helsinki in Finland and obtained my Ph.D. in 2019. Starting in 2020, I have worked as a postdoctoral researcher in Tallinn, Estonia, in the Laboratory of High Energy and Computational Physics, National Institute of Chemical Physics and Biophysics (NICPB).
What are the most exciting open questions in your research area?
Models of cosmic inflation are the most promising explanation for the flatness and homogeneity of the universe and can explain the seeds of cosmic structure. However, it is not clear which of the current models - if any - is the correct one. The search can be narrowed down if the strength of early universe gravitational waves, imprinted on the cosmic microwave background radiation, can be measured.
Concerning primordial black holes, there are many uncertainties related to their formation and evolution that need to be figured out to make accurate predictions that can be compared to upcoming observational data.
What do you like and dislike about being a scientist?
I like the freedom in my everyday life: I can set my own schedule and work on the problems I find interesting.
I dislike the uncertainty of a young scientist's career, with no guarantee that I can continue in physics in the future. Sometimes I'm also frustrated by the slow progress of high-energy physics today, bottlenecked by ever more complicated experiments.
Which of your skills are you most proud of, or find most useful?
I'm proud of my well-rounded skills in programming and computation. I find them a necessary part of a physicist's toolbox today, even for the most hardcore theorist. Most recently, I have delved into rule-based programming in Mathematica. I also value the wide variety of courses on various topics in high-energy physics beyond cosmology that I took during my studies.
In your career so far, at what point were you the most excited, and what were you excited about?
It's hard to single out a moment, but I'm always excited when a new project reaches a state where results start to come out, especially when the results agree with what I already knew or assumed but also provide something new and surprising on top of that.
What new skills would you like to learn in the next year?
I would like to learn more about the history and philosophy of the different interpretations of quantum mechanics. These are relevant for the initial conditions of the universe, where quantum theory dominates and it is not clear how our classical world emerges.
What advances or new results are you excited about or looking forward to?
I'm excited about the next generation of cosmic microwave background radiation experiments, especially the LiteBIRD satellite in the late 2020s. They will probe the tensor perturbations of the early universe with enough sensitivity to confirm or rule out many popular models of cosmic inflation. I also look forward to the upcoming gravitational wave experiments; I'm particularly interested in the possibility of detecting high-frequency gravitational waves which would carry information of the earliest cosmological times.
What is the biggest obstacle that is slowing down your research field right now?
In cosmology and high-energy physics, most easy measurements are done. Today's big experiments take decades and new results arrive slowly. Working on theories and building models is nice, but it's only really useful when confronted with data.
What role do you think a community network like EuCAPT can play in developing theoretical astroparticle physics and cosmology in Europe?
EuCAPT can provide opportunities for early-career scientists: for example, conferences and workshops to present their work and grants for traveling.
What’s your favorite food?
I eat almost anything, but when the craving hits it's usually for a pizza or a burger.
How do you like to relax after a hard day of work?
I play games alone or with friends, watch TV shows, and read. My favorite genres are fantasy and science fiction. When writing this, I'm most excited about the Sandman series airing right now and the upcoming Tolkien adaptation, the Rings of Power.
Do you have any non-physics interests that you would like to share?
I'm a gamer: I play video games, board games, and tabletop role-playing games. On the role-playing front, I'm currently game mastering three semi-regular games for different groups. I also write new material and would like to publish a game of my own someday. If you are a fellow gamer and we end up in the same conference, come and say hi!
If you were not a scientist, what do you think you would be doing?
Designing games for a living would be cool. Realistically though, I think I would work on something programming and data-analysis related.
What do you hope to see accomplished scientifically in the next 50 years?
In cosmology, I hope the upcoming gravitational wave observations in tandem with other experiments sharpen our picture of the universe. In my wildest dreams, I hope we find something completely new that revolutionizes high-energy physics, such as new elementary particles or hints of quantum gravity. Outside high-energy physics, I hope we develop new solutions to the climate crisis, and I'm looking forward to developments in the interfaces between machines and the human brain.
What question would you have liked us to ask you, and what would you have responded?
Do you prefer Star Wars or Star Trek? This is a trick question: my favorite is Babylon 5.