Yeah, quickly (ish) splashed some colour onto it on the bus today, using the ipad. Fun… (Forgot to do some shade strokes on the little girl’s shirt. Eh…)
From Instagram
From Instagram
Market Inks
Well, to be accurate, I did the inking later on. I liked a quick pencil sketch I did at the Hollywood farmer’s market on Sunday. Not far from when I did that previous market scene.
There was a woman who’d set up a stand to do painting of children’s faces with clown-type makeup. Seemed like easy prey to get some interesting sketches.
As it happens I only got one because people had the unfortunate habit of standing Click to continue reading this post
Landmarks
We reached certain key landmarks in the quantum field theory class last week. Not only did we uncover how the Dirac equation predicts that the electron’s spin couples to a background magnetic field, but that it is (to a first approximation) twice the coupling that its angular momentum couples with. This is a remarkable output (once again) from that 
wonderful equation, the result of putting together Quantum Mechanics and Special Relativity. (I’ve discussed other properties of it before, here.) Makes you wonder, doesn’t it? If finding an equation that puts together QM and SR results in so many marvellous things about Nature just falling out so nicely (recall that spin, and also antimatter are also inevitable predictions of the Dirac equation), doesn’t it make you just thirst to know what we’ll learn (predict, explain, discover) when we find how Quantum Mechanics and General Relativity fit together? This is one of the great motivations for the work my research community does, in case you sometimes find yourself wondering – the quest for finding how Nature combines the two things together to make what we call Quantum Gravity. We’ve found one way, on the page, that you can put together QM and GR for sure (you’ve heard of it, it is called string theory) but it’s not yet clear if this form of quantum gravity is the one Nature chooses to work with, and in any case we need to work on it a lot more to understand what we’ve got, as it surely isn’t complete yet. There are huge pieces of the puzzle missing.
Anyway, the next thing we did was the classic computation of the first quantum correction to the “twice” I mentioned above. This is the computation of the famous Click to continue reading this post
Back to the Routine
I’ve finished my four weeks of back and forth between Los Angeles and Santa Barbara. It was very rewarding, although it (of course) meant that I had to make several adjustments to my usual routine, putting aside a number of things (including and consistent work toward moving The Project forward). This is fine, as it was part of the plan to put things aside somewhat and focus on the visit. It meant an interesting process of trying to put most of my Los Angeles business (including teaching and any meetings, etc) into Monday and Friday as much as I could, and catching up with reading and lecture writing in the in-betweens, often on the three to three and a half hour journey on the train. (People universally assumed that I’d driven up, and were mostly surprised when I mention I took the train. One person even inquired as to whether I don’t have a car. I politely explained that I do, but I don’t feel compelled to drive it everywhere. One person could not understand how I would get to the train station in LA without a car. I explained there was a subway system… Others talked about how they never visit LA from Santa Barbara because they can’t get around without a car and the traffic is terrible… They prefer (in one or two examples related to me) to go all the way up to San Francisco where they can just leave the car and explore without it. I smiled politely and mentioned that you can do this in Los Angeles too. This had no effect on their belief system, as far as I can tell. I am constantly amazed at the incredibly limited images of Los Angeles that people hold in their heads. In all cases, we agreed that getting to work on the train was in fact a good thing. I explained, as a bonus, that I get over the business that the train takes twice as long as it should be simply pretending it is twice as great a distance than the 95 miles it actually is. This is true.)
So anyway, sad as it was to leave the KITP behind, with all the stimulating conversations, great talks to attend, friends old and new, and so forth, it is time to Click to continue reading this post
My Other People
On my last day at the KITP in Santa Barbara (this visit) last week I decided, for old times’ sake, to go for a walk along the beach, to the pier, while reading two papers I wanted to think about. It seemed preferable to sitting inside at my desk, and it was a lovely day. I took my notebook/sketchbook just in case I wanted to make notes or sketch something interesting. It also seemed important to go along that beach at a proper slow pace since I’ve not been along there for many years, and it holds a lot of memories for me. (It is, for example, the beach I used to visit late at night – through midnight and beyond – regularly, to teach myself to play the trumpet… part of a story I may have shared with you once before.)
Anyway, while wandering along, and just before the pier, I noticed a group of people all sitting together out on the sand. I looked up from my papers to see what they were up to and realized that they were doing exactly what I thought I might do – they Click to continue reading this post
AdS Vs CMT
So there are two workshops going on here at the KITP in Santa Barbara that pertain to issues in condensed matter physics. (You may recall that I am here for some of the week, and in LA at USC for the rest of the week – adds up to a full week each week.) One is Holographic Duality and Condensed Matter Physics (often referred to as AdS/CMT), concerning applications (I’ve told you about this here before) of techniques from string theory to issues in condensed matter theory and experiment, and the other is Topological Insulators and Superconductors. there are people from both communities on both workshops, and so it is an exciting and interesting time.
The KITP Fall picnic was yesterday, and this means that there’s the traditional football (i.e. soccer) contest between workshops. Not to resolve physics issues, you understand, but to blow off some steam before getting down to the business of eating all the food… Well, at the top of this post and in the following, you can see some pictures of the process of the string theory crowd getting slaughtered for a change:
The score was 5-0.
The KITP Director, David Gross, who has presided over very many matches where the Click to continue reading this post
CicLAvia!
Yes, another CicLAvia, another great time. You’ve read my posts about CicLAvia before, and if not, here are two previous reports (here, and here). More in the related posts at end.
For today, I’ll simply show you a time lapse video I made of my journey:
My notes on the video at YouTube are: Click to continue reading this post
Looking Back and Forth
Somehow after Wednesday I lost track of time, in a sense, in the natural course of having another very busy week. There were several things competing for time, and some of them may be of interest to you. (Left: Some lovely pink gladiolus flowers that have sprung up in my garden.) The Nobel Prizes kept coming, of course, with some very interesting winners announced. In addition to the ones I mentioned already in two earlier posts, I’ve got to find some people among our faculty who’ll be willing to spend 10 to 15 minutes making some informal remarks about the Who/What/Why aspects of the prize at one of two lunches I’ll be hosting in the coming weeks about the Nobel Prize. I’ve mentioned this before. It is an annual event I’ve tried to get going as part of the Dornsife Commons (formerly known as College Commons) series. I’ve locked in Physics and Peace, and want to get people for all the others. This year I know that if I have problems with Chemistry, I can step in if need be, although I’d rather not have to do that – I want to broaden participation, not do everything myself. Look out for those lunches (see here) and come along!
Speaking of doing everything myself, I’ve been continuing the weeks long struggle to get support, interest, and participation for the Science Film Competition I told you about earlier. Having spent a lot of time meeting with many faculty and other parties to build support and understanding, getting lots of faculty to make announcements (one time even coming down from Santa Barbara to campus to give a ten minute announcement in a class at the film school and going up again after!) and so forth – and thanks everyone who has helped! – I decided to amplify my focus on tackling Click to continue reading this post
Quasicrystals!
Wow! WOW!
As you can tell, I am very pleased about the 2011 Chemistry Nobel Prize announcement. I’d love to tell you a bit more about why, but I’m supposed to be working on something urgently right mow, and so will try to do so later. The key thing is that I think the discovery of quasicrystals is fantastic and very visual example of how we can dream up a mathematical structure just because it is interesting and beautiful (Penrose tilings, independently discovered by Roger Penrose as the answer to a mathematical puzzle, (see two dimensional version on left) but also showing up in Islamic tiling patterns from much earlier) and then find later that Nature has exploited that same pattern to make something- a new form of matter (the quasicrystals themselves… The subject of today’s prize to Dan Shechtman – image below on right is of a silver and aluminium quasicrystal compound. Both images here are from wikimedia commons.).
I was in love with these things when I was an undergraduate, not long after their discovery, Click to continue reading this post
The 2011 Nobel Prize in Physics
Ok. So who was surprised by this one? My hand is not up… is yours? (That’s a screen shot from the Nobel Prize site to the left. More here. Cheeky of me, but it’s early in the morning and I’ve got to pack, shower, and cycle like mad to the subway to get to my train to Santa Barbara, so time is of the essence.)
I was pretty sure that this would be the prize sometime very soon, although I’ll not say that I knew it would be this year’s for sure. It is well deserved, since this was a genuinely major change in how everyone in the field thinks about the universe, and we’re still trying to get to grips with it today. The acceleration of the universe that they Click to continue reading this post
“Read a Book, Already”
Forgot to mention that the West Hollywood Book Fair is on today! Here’s their excellent promo video:
I’m going to see if I can make it down there at some point…
-cvj
Markets and Musings
I’m back in Los Angeles from my visit to the workshop (see earlier), have a bit of a cold, and am tired. I’ve been thinking a lot about various issues in quantum field theory, surrounding quantum entanglement, non-equilibrium processes, Fermi surfaces, and a lot more like that. I’ve also been teaching about real QED processes in the class today – they are now able (I hope) to compute real cross-sections for things like electron-electron scattering, and electron-positron scattering! Very rewarding actually.
Anyway, I’m tired, so I decided to spend a little time relaxing by experimenting with watercolours of a sort. The digital kind. This is a sketch I did in my little square notebook at the Hollywood Farmer’s Market last week, and back then I’d started to use colour pencils to do some colour on it and got a bit bored… So I did a bit more just Click to continue reading this post
Breakfast Guy
I’ve no idea who he was, but he made for an interesting subject for several minutes*, sitting eating his breakfast with his (I think) wife. I was staying at a hotel and having breakfast, just North of Santa Barbara. The person I set out wanting to draw (very interesting face) was sitting right opposite me, at the same table as me, looking over regularly, and so it seemed a bad idea to try to sketch him. Also, he turned out to be a physicist also visiting at the KITP for a workshop, and so it could have ended up quite awkward.
It was a pretty good week at the workshop. I had a number of interesting conversations with young people trying out ideas and calculations, who’ve actually read (!) various papers of mine, and so had questions and Click to continue reading this post
Science Film Connections
So journalist Pamela Johnson (no relation!) did a nice article last week about the science+film competition I mentioned to you (see also here). It is entitled “It Could Happen One Night”, and you can take a look at it here.
If you’re a student at USC and thinking that you can’t do this because you don’t know about science, or you don’t know about film… don’t give up! You might just need help to figure out how to get in contact with students who also want to get involved in making a film and want to learn more about one side or another (so you’re in the Click to continue reading this post
Head Lines
Well, here I am, almost at the end of Saturday, and rather behind on where I wanted to be. Somehow, a half-day shoot for a TV show turned into an all day marathon, due to a series of mishaps and so forth. The first part of the shoot was fun (it involved me in a pool hall, occasionally potting balls and so forth), but not the second. But I soldiered on, managing to explain a bunch of concepts about quantum mechanics, spacetime, and quantum gravity. We’ll see what comes of it. It’s all for science, and for you…
So much of the afternoon had been set aside of writing, and for maybe a little drawing practice, and it’s all mostly gone now and the only thing I feel left in the mood for is Click to continue reading this post
