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30 June (2020)
Classic!
23 June (2020)
22 June (2020)
Elena, Raul, Guillermo and Edu's cover of "Antes de Verte" de Rozalén; a confinement experiment youtube.com/watch?v=0h5bEG…
19 June (2020)
Fabrice Laussy reposted
PRB Editors' Suggestion: Optical resonance shift spin-noise spectroscopy
D. S. Smirnov and K. V. Kavokin
Phys. Rev. B 101, 2…
D. S. Smirnov and K. V. Kavokin
Phys. Rev. B 101, 2…
18 June (2020)
Our scheme of tuning photon statistics makes the cover of another journal!
onlinelibrary.wiley.com/doi/10.1002/lp… -- this is also part of the story!
onlinelibrary.wiley.com/doi/10.1002/lp… -- this is also part of the story!
New work published: @PhysRevA 101, 063824 (2020) - Tuning photon statistics with coherent fields journals.aps.org/pra/abstract/1… ; this one took us a looooot of time, I'll tell you the story.
First, Dijon, then this... it seems every country is reaching new limits of sheer violence, though in its own very particular way. "Good night? I'll kill you!"
@DannyDutch Why do they remove the best stuff from twitter? This was priceless.
17 June (2020)
Great read. Another 25 years... that time frame has been a constant since about 1980.
16 June (2020)
Les images de l'infirmière que la police a interpellée après qu'on l'eut vu jeter des cailloux, me font penser à Victor Hugo qui s'exprime (à travers le conventionnel G) sur la démolition compliquée de colère.
«Un nuage s'est formé. Au bout de quinze siècles, il a crevé. Vous faites le procès au coup de tonnerre. Sa colère sera absoute par l'avenir. Son résultat, c'est le monde meilleur. Si la balance doit pencher, que ce soit du côté du peuple. Il y a plus longtemps qu'il souffre.»
That's a well-deserved name they got.
15 June (2020)
The wavelet decomposition [https://t.co/QARFJUaJsM] has much to tell us about what wavefunctions do. This (in our last paper) is how @david__co understands Airy beams, those strange packets that accelerate without being pushed: journals.aps.org/prresearch/abs…
What happens is that the wavepacket folds onto itself, producing a self-interference, i.e., fringes, that the eye can't help but track, giving the feeling that such peaks are physical objects. Whence the free-acceleration (the centroid, which the eye doesn't see, goes linearly).
The beauty is that this "representation" of the wavefunction has a neat and physically clear structure: the various lines plotted on top. Although the full solution ('s analytical expression) is unknown to us, its skeleton is very simple. That is Physics.
Even the diffusing Gaussian wavepacket gets an interesting new reading in this representation (that's in the appendix), with a clear visualisation of the motion "of the modes" that otherwise gets lost into diffusion.
And, also in the appendix, the typical "last but not least", by doctoring up the wavepacket in its wavelet form, namely, cutting off its tails, we expect to preserve the magical properties of the Airy beams, by protecting the self-interference. And indeed that's what happens.
Now the finite-energy Airy beam accelerates for much longer times. It's not clear how to dynamically cut the tails like that (again, that's in the appendix) but it shows this stuff in wavelet space means something, which has much to tell us about what wavefunctions do.
11 June (2020)
5 June (2020)
Replying to @lilyslynch and @Lukewearechange
What was it again about "truth, justice and the American way"?
You can see the struggle between their humanity, and their training. That's Milgram experiments big scale and in the streets. Everybody can participate.
This is actually fairly comforting, it shows that when there's at least a bit of science involved, there's only so far politics can go in bypassing the truth. It's not easy to cheat without being caught. Even considerable political weight cannot choke science completely.
4 June (2020)
Carlos is looking for a PhD student. Be his first, you certainly won't be his last and that'll make you special when you speak at the many events ahead (his 75th birthday, his Nobel prize, his death...) And you'll do great things in the meantime.
3 June (2020)
With legal & governmental actions following this paper, this'll make the Schön scandal a naughty mischief in comparison. That's not a fight between science & ego or science & ethics, but between science and state propaganda. Not a paper withdrawal but people's lives are at stake.
2 June (2020)
1 June (2020)
"If you want a vision of the future, imagine a boot stamping on a human face – forever." George Orwell.
Replying to @rudy_betrayed and @GregShahade
Another illustration of civilization free-falling.