Arttu Rajantie
@artturajantie.bsky.social
Finnish cosmologist and particle physicist with two passports. Professor of theoretical physics at Imperial College. Chair of the Finnish Science Society in the UK. School governor. Rejoiner. #RejoinEU #FBPE
https://profiles.imperial.ac.uk/a.rajantie
https://profiles.imperial.ac.uk/a.rajantie
This is exciting. Heavy ion collisions generate the strongest magnetic fields in the Universe in which magnetic monopoles could be produced by the dual Schwinger mechanism (see doi.org/10.1103/Phys...). There are now three experiments searching for them at the LHC: MoEDAL-MAPP, ATLAS, and ALICE.
‘Tis the season of heavy ions
Last Friday at 3.40 pm, a new #HeavyIon run began at the Large Hadron Collider, the fourth of #LHCRun3.
Find out more about the primordial state of matter studied in heavy-ion collisions at the LHC: www.youtube.com/watch?v=mBfJ...
Last Friday at 3.40 pm, a new #HeavyIon run began at the Large Hadron Collider, the fourth of #LHCRun3.
Find out more about the primordial state of matter studied in heavy-ion collisions at the LHC: www.youtube.com/watch?v=mBfJ...
November 17, 2025 at 4:57 PM
This is exciting. Heavy ion collisions generate the strongest magnetic fields in the Universe in which magnetic monopoles could be produced by the dual Schwinger mechanism (see doi.org/10.1103/Phys...). There are now three experiments searching for them at the LHC: MoEDAL-MAPP, ATLAS, and ALICE.
I am delighted to share that I have been elected to serve on the council of the European Movement UK @europeanmovement.co.uk for the next two years. Thank you everyone who voted. And if you are not yet a member, now is the time to join!
www.europeanmovement.co.uk
www.europeanmovement.co.uk
European Movement
European Movement UK is the UK's largest grassroots organisation fighting Brexit's damaging impact on jobs, workers' rights, and trade. We campaign for closer UK-EU relations, restored freedom of move...
www.europeanmovement.co.uk
November 15, 2025 at 3:25 PM
I am delighted to share that I have been elected to serve on the council of the European Movement UK @europeanmovement.co.uk for the next two years. Thank you everyone who voted. And if you are not yet a member, now is the time to join!
www.europeanmovement.co.uk
www.europeanmovement.co.uk
The deadline for voting in the European Movement UK @europeanmovement.co.uk elections is this Friday 14 November. If you are a member, don't forget to vote. If you are not, join!
I am standing in the elections for the European Movement UK @europeanmovement.co.uk council. If you are a member, please vote (for me or one of the other great candidates) using the link you received by email. If not, you should join!
(Photo by Betty Zapata, courtesy of
@neweuropeansuk.bsky.social)
(Photo by Betty Zapata, courtesy of
@neweuropeansuk.bsky.social)
November 12, 2025 at 12:51 PM
The deadline for voting in the European Movement UK @europeanmovement.co.uk elections is this Friday 14 November. If you are a member, don't forget to vote. If you are not, join!
Freedom of movement is always discussed in terms of immigration, but ending it had a much bigger effect on emigration: The number of British citizens moving abroad (to any country) fell by nearly 50%. #Brexit
(Source:
ons.gov.uk/peoplepopula...)
(Source:
ons.gov.uk/peoplepopula...)
November 11, 2025 at 5:39 PM
Freedom of movement is always discussed in terms of immigration, but ending it had a much bigger effect on emigration: The number of British citizens moving abroad (to any country) fell by nearly 50%. #Brexit
(Source:
ons.gov.uk/peoplepopula...)
(Source:
ons.gov.uk/peoplepopula...)
I am standing in the elections for the European Movement UK @europeanmovement.co.uk council. If you are a member, please vote (for me or one of the other great candidates) using the link you received by email. If not, you should join!
(Photo by Betty Zapata, courtesy of
@neweuropeansuk.bsky.social)
(Photo by Betty Zapata, courtesy of
@neweuropeansuk.bsky.social)
November 5, 2025 at 10:59 AM
I am standing in the elections for the European Movement UK @europeanmovement.co.uk council. If you are a member, please vote (for me or one of the other great candidates) using the link you received by email. If not, you should join!
(Photo by Betty Zapata, courtesy of
@neweuropeansuk.bsky.social)
(Photo by Betty Zapata, courtesy of
@neweuropeansuk.bsky.social)
It is ridiculously expensive to come and work in the UK, and it is hurting scientific research.
Today we have published a new analysis of UK immigration costs, comparing the 2025 costs of skilled worker, researcher and student visas in the UK and 17 other leading science nations. This updates previous analysis from 2019, 2021 and 2024:
royalsociety.org/news-resourc...
royalsociety.org/news-resourc...
UK immigration costs: an international comparison of skilled worker, researcher and student visas in 2025 | Royal Society
2025 update to the Royal Society's analyses of upfront immigration costs in the UK and 17 other leading science nations.
royalsociety.org
October 25, 2025 at 9:22 PM
It is ridiculously expensive to come and work in the UK, and it is hurting scientific research.
Reposted by Arttu Rajantie
This analysis from The Royal Society highlights an extremely important issue facing the UK R&D sector.
Today we have published a new analysis of UK immigration costs, comparing the 2025 costs of skilled worker, researcher and student visas in the UK and 17 other leading science nations. This updates previous analysis from 2019, 2021 and 2024:
royalsociety.org/news-resourc...
royalsociety.org/news-resourc...
UK immigration costs: an international comparison of skilled worker, researcher and student visas in 2025 | Royal Society
2025 update to the Royal Society's analyses of upfront immigration costs in the UK and 17 other leading science nations.
royalsociety.org
October 22, 2025 at 10:08 AM
This analysis from The Royal Society highlights an extremely important issue facing the UK R&D sector.
The cost of a visa for a researcher moving to the UK is 22 times that of international average: www.chemistryworld.com/news/the-cos...
The cost of a visa for a researcher moving to the UK is 22 times that of international average
Royal Society is warning that the high upfront costs are putting off talented researchers
www.chemistryworld.com
October 25, 2025 at 9:17 PM
The cost of a visa for a researcher moving to the UK is 22 times that of international average: www.chemistryworld.com/news/the-cos...
Reposted by Arttu Rajantie
Hei kaikki!
We are finally here on Bluesky, and have lots of exciting things planned for the upcoming year, so do give us a follow!
To get us started, this Friday (17.10) we are hosting a welcome meeting at the Star Tavern (SW1X 8HT) from 4:30pm. All Finnish & Finnish minded researchers welcome!
We are finally here on Bluesky, and have lots of exciting things planned for the upcoming year, so do give us a follow!
To get us started, this Friday (17.10) we are hosting a welcome meeting at the Star Tavern (SW1X 8HT) from 4:30pm. All Finnish & Finnish minded researchers welcome!
October 13, 2025 at 2:00 PM
Hei kaikki!
We are finally here on Bluesky, and have lots of exciting things planned for the upcoming year, so do give us a follow!
To get us started, this Friday (17.10) we are hosting a welcome meeting at the Star Tavern (SW1X 8HT) from 4:30pm. All Finnish & Finnish minded researchers welcome!
We are finally here on Bluesky, and have lots of exciting things planned for the upcoming year, so do give us a follow!
To get us started, this Friday (17.10) we are hosting a welcome meeting at the Star Tavern (SW1X 8HT) from 4:30pm. All Finnish & Finnish minded researchers welcome!
Scientists charged too much to come to work in UK, says @royalsociety.org
www.ft.com/content/7144...
www.ft.com/content/7144...
Scientists charged too much to come to work in UK, says Royal Society
Combined upfront cost of the five-year Global Talent Visa and the Immigration Health Surcharge stands at £5,941
www.ft.com
October 22, 2025 at 7:40 PM
Scientists charged too much to come to work in UK, says @royalsociety.org
www.ft.com/content/7144...
www.ft.com/content/7144...
I hope this will now finally happen:
UK students get chance to study in Europe from January 2027 under new Erasmus deal
inews.co.uk/news/politic...
UK students get chance to study in Europe from January 2027 under new Erasmus deal
inews.co.uk/news/politic...
UK students get chance to study in Europe from January 2027 under new Erasmus deal
The EU is pushing for a rapid agreement for Britain to rejoin the student exchange scheme
inews.co.uk
September 26, 2025 at 8:03 AM
I hope this will now finally happen:
UK students get chance to study in Europe from January 2027 under new Erasmus deal
inews.co.uk/news/politic...
UK students get chance to study in Europe from January 2027 under new Erasmus deal
inews.co.uk/news/politic...
The #Brexit "reset" talks are starting soon. Make sure the government knows what you want from them.
www.bbc.com/news/article...
www.bbc.com/news/article...
Rachel Reeves signals wider reset of EU relations
Labour has ruled out rejoining the EU but may be open to alignment on areas such as farm and food exports.
www.bbc.com
December 10, 2024 at 7:05 PM
The #Brexit "reset" talks are starting soon. Make sure the government knows what you want from them.
www.bbc.com/news/article...
www.bbc.com/news/article...
Imperial College London is hiring a Postdoctoral Research Associate in theoretical cosmology/quantum field theory from 1 October 2025. Application deadline 15 December.
academicjobsonline.org/ajo/jobs/29340
academicjobsonline.org/ajo/jobs/29340
Imperial College London, Theoretical Physics
Full service online faculty recruitment and application management system for academic institutions worldwide. We offer unique solutions tailored for academic communities.
academicjobsonline.org
December 3, 2024 at 7:32 PM
Imperial College London is hiring a Postdoctoral Research Associate in theoretical cosmology/quantum field theory from 1 October 2025. Application deadline 15 December.
academicjobsonline.org/ajo/jobs/29340
academicjobsonline.org/ajo/jobs/29340
Reposted by Arttu Rajantie
Got my paper copy! ☺️ @newscientist.bsky.social
Great article on the front page, featuring my work, but also interviewing great experts like Ruth Gregory, Katy Clough, Ian Moss, @artturajantie.bsky.social, & John Ellis on the metastability of the Higgs boson and it's consequences for our Universe!
Great article on the front page, featuring my work, but also interviewing great experts like Ruth Gregory, Katy Clough, Ian Moss, @artturajantie.bsky.social, & John Ellis on the metastability of the Higgs boson and it's consequences for our Universe!
November 29, 2024 at 11:03 PM
Got my paper copy! ☺️ @newscientist.bsky.social
Great article on the front page, featuring my work, but also interviewing great experts like Ruth Gregory, Katy Clough, Ian Moss, @artturajantie.bsky.social, & John Ellis on the metastability of the Higgs boson and it's consequences for our Universe!
Great article on the front page, featuring my work, but also interviewing great experts like Ruth Gregory, Katy Clough, Ian Moss, @artturajantie.bsky.social, & John Ellis on the metastability of the Higgs boson and it's consequences for our Universe!
Discussing vacuum decay in the latest @newscientist.bsky.social.
www.newscientist.com/article/mg26...
www.newscientist.com/article/mg26...
The universe could vanish at any moment – why hasn’t it?
A cataclysmic quantum fluctuation could wipe out everything at any moment. The fact that we’re still here is revealing hidden cosmic realities
www.newscientist.com
November 20, 2024 at 11:10 AM
Discussing vacuum decay in the latest @newscientist.bsky.social.
www.newscientist.com/article/mg26...
www.newscientist.com/article/mg26...
‘Brexit is hell,’ artists say as report reveals toll of EU exit on musicians www.independent.co.uk/news/uk/poli...
‘Brexit is hell,’ artists say as report reveals toll of EU exit on musicians
Brexit has been ‘a catastrophe’ for the industry, with nine in 10 artists facing a hit to their earnings, UK Music’s annual economic report said
www.independent.co.uk
November 20, 2024 at 7:52 AM
‘Brexit is hell,’ artists say as report reveals toll of EU exit on musicians www.independent.co.uk/news/uk/poli...
Petition: Apply for the UK to join the European Union as a full member as soon as possible petition.parliament.uk/petitions/70...
Petition: Apply for the UK to join the European Union as a full member as soon as possible
I believe joining the EU would boost the economy, increase global influence, improve collaboration and provide stability & freedom. I believe that Brexit hasn't brought any tangible benefit and there ...
petition.parliament.uk
November 19, 2024 at 9:40 PM
Petition: Apply for the UK to join the European Union as a full member as soon as possible petition.parliament.uk/petitions/70...
Reposted by Arttu Rajantie
November 15, 2024 at 4:53 PM