A Quantum Diaries Survivor

Lately I have been writing lots of reference letters for students who are applying to Ph.D. positions in Physics, and in so doing I have found myself pondering on the dubious usefulness of that exercise. So let me share a bit of my thoughts on the matter here.Reference letters are meant to be an important input for academic selections, because they provide first-hand information on the previous experience of the candidates, from scholars who are supposed to be authoritative enough to be trusted, and unconcerned enough to provide a unbiased assessment. 

After a month of intense travel, which among other things included attendance to the MODE Workshop in Crete and the EUCAIF conference in Sardinia, I am back to northern Sweden. Besides significantly improving my well-being, given the horrible heat wave that hit Southern and Central Europe in the past few weeks, the move north allows me to finally give a relaxed look back at the most relevant information I gathered at those events, and other relevant things.

Applications for MSCA Post-doctoral fellowships are on, and will be so until September 10 this year. What that means is that if you have less than 8 years of experience after your Ph.D., you can pair up with a research institute in Europe to present a research plan, and the European Commission may decide to fund it for two years (plus 6 months in industry in some cases).In order for your application to have a chance to win funding, you need to: 

have a great research topic in mind, 
be ready to invest some time in writing a great application, and 
pair up with an outstanding supervisor at a renowned research institute. 

Time is a gentleman - it waits patiently. And in physics, as in all exact sciences, problems and mysteries eventually get resolved, if we give it enough time. That is how science works, after all: the consensus on our explanation of reality changes as we acquire more information on the latter.

The other day I finally emerged from a very stressful push to submit two grant applications to the European Innovation Council. The call in question is for PATHFINDER_OPEN projects, that aim for proofs of principle of groundbreaking technological innovations. So I thought I would broadly report on that experience (no, I am not new to it, but you never cease to learn!), and disclose just a little about the ideas that brought about one of the two projects.Grant applications 

The human race has made huge progress in the past few thousand years, gradually improving the living condition of human beings by learning how to cure illness; improving farming; harvesting, storing, and using energy in several forms; and countless other activities. Progress is measured over long time scales, and on metrics related to the access to innovations by all, as Ford once noted. So it is natural for us to consider ourselves lucky to have lived "in the best of times". Why, if you were born 400 years ago, e.g., you would probably never even learn what a hot shower is! And even only 100 years ago you could have been watching powerless as your children died of diseases that today elicit little worry.

For the third time in 9 years I am visiting San Pedro de Atacama, a jewel in the middle of nowhere in northern Chile. The Atacama desert is a stretch of extremely dry land at high altitude, which makes it exceptionally attractive for astronomical activities. In its whereabouts, e.g., are some of the largest telescopes in the world - the Cerro Paranal Very Large Telescope (VLT), and the planned Extremely Large Telescope (ELT) now being built in Cerro Armazones. And I have news that an even larger telescope, tentatively dubbed RLT for Ridiculously Large Telescope, is being planned in the region...

What? Another boring chess game?Buzz off, this is my blog, and if I feel like posting a chess game, that's what is going to happen. But if you like the game, stay here - this is a nice game.Again played after hiours today, and again on a 5' online blitz server (chess.com). What amazes me is that these days I seem to have a sort of touch for nice attacks and brilliant combinations. Let me show you why I am saying this.The starting position arose after the following opening sequence:tommasodorigo - UTOPII841, chess.com April 16 2025

After a very intense day at work, I sought some relaxation in online blitz chess today. And the game gave me the kick I was hoping I'd get. After a quick Alapin Sicilian opening, we reached the following position (diagram 1):As you can see, black is threatening a checkmate with Qxg2++. However, the last move was a serious error, as it neglected the intrinsic power of my open files and diagonals against the black king. Can you find the sequence with which I quickly destroyed my opponent's position?1. Qc2! 

The highest-mass subnuclear particle ever observed used to the the top quark. Measured for the first time by the CDF experiment in 1994, and subsequently confirmed by CDF and D0 in 1995, the top quark is the heaviest elementary particle we know of, and it is a wonderful physical system per se, which has been studied with momentum in the past thirty years at the Tevatron and at the LHC colliders. The top quark

In a world where misinformation, voluntary or accidental, reigns supreme; in a world where lies become truth if they are broadcast for long enough; in a world where we have unlimited access to superintelligent machines, but we prefer to remain ignorant; in this world we are unfortunately living today, that is, the approach taken by scientists to accumulate knowledge - peer review - is something we should hold dear and preserve with care. And yet...

Perhaps the most important thing to get right from the start, in most statistical problems, is to understand what is the probability distribution function (PDF) of your data. If you know it exactly -something that is theoretically possible but only rarely achieved in practice- you are in statistical heaven: you can use the maximum likelihood method for parameter estimation, and you can get to understand a lot about the whole problem.