Jonas Neergaard-Nielsen

Four years ago I woke up at 5 am from distant explosions. I asked my boyfriend if he heard them too, he said he didn’t and I should go back to sleep. I tried to calm myself down, went on the internet, it was silent, no news or explanations.

@XanaduAI @Nature This is so beautiful! Congrats on an excellent achievement 👏 🎉

.@XanaduAI has achieved a major breakthrough, creating the world’s first photonic GKP qubit on an integrated chip. Published today in @Nature this is more than just a milestone; it’s a step toward scalable, fault-tolerant quantum computing. nature.com/articles/s4158… 🧵1/3

@peterlmcmahon Super cool and fun device and demonstrations! Congrats👏 Apart from the low nonlinearity, I suppose there's also a limitation to the length of the device (and overall SHG) coming from the projector resolution. But nonetheless interesting to imagine possible applications.

*Programmable on-chip nonlinear photonics* We have developed a device containing a slab waveguide with arbitrarily programmable nonlinearity: its χ^(2) distribution as a function of 2D space can be reconfigured into any desired pattern, allowing a wide range of processes. 1/

NYU Professor @JonHaidt has written one of the most important books of our time, "The Anxious Generation", so I jumped at the chance to work with him on a rap video about the key ideas. The graphs come from Jon's lecture slides; pause and take them in, and shut the phones off!

@sorenpind Gjort! 🇺🇦

Støt den danske Ukraine komité - vis det ikke bare er snak. MobilePay 924084. Hver eneste krone går direkte til det ukrainske forsvar. Og del dette tweet for at hjælpe. Til så mange som overhovedet muligt.

I am incandescent with rage right now. I feel sick to the stomach. A US Vice President stood today on the soil of where so many Americans gave their lives to defeat fascism in Europe. He delivered a disgraceful speech that spat on their graves. Not that we should expect any different, given his boss skipped visiting the graves of fallen Americans in Europe for fear of getting his hair wet. The same man who called the same fallen heroes suckers and losers. As a Brit that loves America and the American people, I am deeply disturbed at the insults delivered by a man who once described Donald Trump as an “idiot" and said he was "reprehensible." Privately, comparing him to Adolf Hitler. How times have changed. Vance is now part of the most authoritarian administration in American history. An administration actively seeking to deny bodily autonomy to women. An administration pursuing the same mass deportation of immigrants that Europe witnessed in 1930s Germany. Vance is a man that his own president doesn’t even see as his successor. He came to Europe to vomit his Christo-fascist bile on leaders from the UK and across Europe, in what appears to be a retribution tour designed to assert American power. The U.S. are to my knowledge the only NATO country to have invoked Article 5 of the NATO charter after 9/11. We, his European allies, met that call with no questions asked. We sent thousands of soldiers to the battlefields of Afghanistan and Iraq to fight a war on the false premise of Donald Rumsfeld’s ‘known unknowns’. We did this despite millions of our own citizens protesting in the streets of our cities. Our military stood shoulder to shoulder with his military and we, like many Americans, stood to salute our fallen young men and women returning home day after day. I have tears in my eyes as I write this, thinking of them and their loved ones. Our brave men and women willingly gave their all and far too many made the ultimate sacrifice in support of an American led war. For the record, 6000 Ukrainian solders server alongside American soldiers in Iraq. This, despite Ukraine not being a member of NATO. In 1994 upon signing the Budapest Memorandum they gave up their nuclear weapons in return for security assurances from the US and the UK. These were then reneged upon in 2014 when Russia invaded Crimea. They were told ‘An assurance is not a guarantee’. Now, despite their friendship and their brave sacrifice on the battlefields of Ukraine, the President of the United States has decided to abandon them and hand a victory to an indicted war criminal, who illegally invaded the sovereign territory of a US ally. An ally who’s soldiers had previously lost their lives supporting America in its war on terror. SHAME ON HIM. Shame on the man who dodged the draft and never served a day in defense of his nation. He is a coward and I would gladly call him that to his face. To all those Americans on social media currently posting vile insults to those who have always been there for America, I say, democracy is bigger than you, as you sit anonymously behind your phones posting poison. America might have the most powerful army on the planet, but remember, that same army fled from Saigon after being handed their ass by a bunch of peasant rice farmers, armed with grenades made from discarded US coke cans. Ukraine have been to the Russian army what the Vietnamese were to you and we salute them. You might want to throw Ukraine under the bus while stealing there mineral deposits, BUT EUROPE WILL NOT ALLOW THAT TO HAPPEN. I know for sure that the UK will not abandon the Ukrainian people. Our aid to GDP contribution already exceeds that of the US as does Poland, Germany Finland and others. The U.S. is no longer a reliable ally and if need be, we will stand with Ukraine without America. As for your pathetic tariffs, do your worst. You will soon have no friends but thugs and autocrats, so I’m sure Wun Dum Fuc will be right at home.

#TsuchinshanATLAS from Weissenhäuser Strand, Germamy

Postdoc positions available in our amazing photonic quantum computing team at Technical University of Denmark! Application deadline 1. September. Gaussian Boson Sampling and similar protocols. Bulk optics: efzu.fa.em2.oraclecloud.com/hcmUI/Candidat… Integrated optics: efzu.fa.em2.oraclecloud.com/hcmUI/Candidat…

Marie Curie did not have to fit 9 deliverabkes, 17 milestones and 44 tasks in a 24 months gantt chart as we, who got the grant in her name, have to do

@cernotik Great of you to write this up, Ondrej! Happy for you that you've managed to overcome or at least manage this impediment. 💪🏻

@neuranne Work: Mostly, but not entirely English. Private: mostly Danish. Sometimes language can get mixed up within a note/list - may depend on what language I was speaking just before getting that thought.

Bilingual folks – do you take notes in English and/or in your other language? What about journaling? Do you think differently depending on the language?

@oledoteth @readwise save thread

I just came across this mind-blowing psychological trick I can't stop experimenting with... The Ben Franklin Effect:

@nokoa @lillbobbo @nickcave It wasn't in my spam folder either.

@lillbobbo @neago @nickcave Thank you it worked! I too didn’t receive the code (it must have been considered as spam)

Nick Cave & The Bad Seeds announce THE WILD GOD TOUR: 27 dates across the UK and Europe in 2024. Tickets on sale Friday 22 March, 10am local time. Sign up to the Nick Cave & The Bad Seeds mailing list by 19 March (midnight GMT) for Artist Presale access on 20 March, 10am local time: nickcave.com/tour-dates/ Current mailing list subscribers will automatically be included.

@lillbobbo @nickcave 😘 to you, thanks!

@neago @nickcave Try WILDGOD24

@itsmealeale Bam! 💥

Stay tuned: both papers appearing on arXiv on Monday!

@SubhashishB19 A 2D slice through the four degrees of freedom along x1-x2 and p1-p2 would show the two-mode squeezing. One showing correlation, the other anti-correlation.

I have been wondering if there a way to visualise a two-mode squeezed state in a phase space with 3D Wigner function! What’s the best we can do? For single mode it’s obvious and visually intuitive. Any suggestion/opinion is much appreciated. #QuantumOptics

Today is exactly 10 years since the @TIME magazine covered the greatest quantum computing company of all times (after @DulwichQuantum), @DWaveQuantum. Let's take a trip down the memory lane and remind ourselves of the early days of quantum computing hype. content.time.com/time/subscribe…

Last January, I noticed something peculiar in my 2yo’s bedroom that - after a year of obsessive reporting - led me to a profound cosmic revelation about what’s even possible in our universe. A 🧵.