Coffee break. Day two of the panel work. Locked in a room again, looking at proposals. Yesterday we deliberated over who passed to the next stage, and who did not – a painful process at times. Today there’s a final part of the process to be performed. We are writing … Click to continue reading this post
It was a long day on the Job. From 8:15am to 6:15pm, we were stuck in one room for more or less the entire time. Now…. a quick guinness on the way back from dinner. Conversation about the private vs public forms of university, funding in science in general, dark … Click to continue reading this post
Well, it was only yesterday that I was telling the physics 100 class all about Special Relativity (lots of incredulous looksâ€¦. lots of reassurances, including: â€œYouâ€™re confused? Thatâ€™s ok! It is one of the greatest pieces of science of the 20th Centuryâ€¦ Itâ€™s not supposed to be trivialâ€¦.â€), but it seems like an age ago, and very distant. Thatâ€™s because Iâ€™m in Dublin today. (Pesky wormholes.)
Just for a few days.
Guinness will be involved, I imagine (yeah!), although it will not be the primary focus. (The pint in the photo to the right is from a previous trip.) [ … ] Click to continue reading this post
So imagine the following:
Youâ€™re walking along the street, minding your own business, and somebody walks up to you and tries to sell you a string theory. So you stop and examine the goods, since youâ€™re in the market for string theories, on the lookout for any that might be novel, useful, bright, or shiny, etc. You never know when one or other property might come in useful.
Question: How do you know that it is a string theory? Let me be sure to point out that it comes with a lot of the defining path integral done for you. In other words, you donâ€™t have to do the integral over string world sheet metrics and world sheet fields. This was done in the factory for you. What you have access to are parameters such as the coefficients of the operators in the theory, and you can also adjust the value of the string coupling.
So a lot of the stuff you would recognize as a string theory in your typical string theoristâ€™s notebook have been cleaned up. Theyâ€™ve been integrated over. The observable physics actually never cared about them (the technical details of summing over metrics – slicing up the moduli space of inequivalent metrics properly at each genus, etc etcâ€¦. all done), assuming youâ€™ve done the integrals properly. The factory did it all for you.
So what criteria do you use to decide that it is a string theory at all? Actually, this is not an idle question. Think about the issue in the context of trying to understand some […] Click to continue reading this post
As part of the Freshman Seminar I told you about earlier (e.g., here, here and here), we went on a field trip to MOCA in nearby downtown LA.
We went to see the exhibition of drawings by Eva Hesse. Hesse is very well known for her sculpture, and among the things she did, I think that a rather splendid one in this context is the one below. It is an example of those that resemble three dimensional renderings of her interesting use of line on the paper.
This one (not in the exhibition) is called â€œMetronomic Irregularityâ€ (I think it has a number as wellâ€¦ there are several pieces of this title done by her).
The group is standing in front of the sculpture I posted about earlier. Thereâ€™s Ashley and Adam, left and middle. Jeff (on the right in the picture) -who is not a freshman, but a senior who does physics research projects with me- came along as well. We had a rather good time, taking […] Click to continue reading this post
Ah! The joy of new colleagues! I have somehow forgotten to tell you one piece of the great news that we had here at USC Physics and Astronomy recently. We got three new faculty, and one of them is here in action (I’ll tell you about the others later), telling us about the physics behind the 2006 Physics Nobel Prize. This is Cosmologist/Astrophysicist Elena Pierpaoli:
She’s one of those people who works closely on (among other things) the data from […] Click to continue reading this post
I forgot to tell you about this last week, so here goes. The colloquium last week was given by John Oâ€™Brien. One of the perks of the job of having to organize the departmentâ€™s colloquium series is that you can use it (on rare occassions) as a blunt tool to find things out. Iâ€™ve always been curious about connecting the name I saw on one of the labs downstairs to a face. Johnâ€™s lab, primarily part of the Engineering department, uses a little of the space in our building, you see, but Iâ€™ve never really made the connection between the face and the name. It certainly seemed that the USC Center for Photonics, of which he is part, was certainly up to some interesting and fun stuff, and so, egged on by another curious colleague, I sent him an invitation to give us a colloquium. He generously accepted, and here he is:
The talk -see the abstract here- was excellent. As you can see from the website listing the faculty in the centre, they are concerned with all sorts of fun things to do with very small scale devices which do rather clever things with light, such as nanoscale semiconductor lasers. The reason that the talk was excellent, in my opinion, was because it was not a standard device+engineering talk that you can often get from very good engineers who nevertheless don’t neccessarily appreciate what aspects the physicists care about. Those talks can often be pretty pictures and […] Click to continue reading this post
So I think maybe I died and went to cvj heaven. Let me explain. I mentioned to you a while ago the freshman seminar entitled “The Art and Science of Seeing and the Seeing and Science of Art”, for which there was an enrollment snafu. Well, […] Click to continue reading this post
I’ve come to realise that there are all sorts of really interesting people on the USC campus, involved in fascinating work and interesting projects of one sort or another. This is of course true for any university. However, I am still finding pleasant surprises and connections quite regularly. The last … Click to continue reading this post
For you physics lurkers at USC (you know who you are!), consider going to the following event (RSVP by tomorrow): Our distiguished (and superpowered -she can fly) librarian, Sara Tompson, in conjunction with the USC Women in Physics Society, have organised a tour and demo of various of the science … Click to continue reading this post
Look what arrived the other day! More later…. [Update: There was never meant to be a paperback. They told me this. The reason
Below (nearer the end of this post) is the description of the “Uncertainty” event (Thursday 31st August, 7:00pm, USC’s Annenberg auditorium; much more here) part of USC’s Visions and Voices program I told you about in the previous post. These are, as I said, events that build upon the Categorically … Click to continue reading this post
This year, there’s going to be even more to do on the USC campus to broaden your mind, and several events which link USC with off campus venues such as theatres, museums, and performing arts centers. The (then) new Provost, Max Nikias, announced his “Arts and Humanities Initiative” in his … Click to continue reading this post
Well, I gave the talk and I’m back at my temporary apartment. I’m exhausted, as is always the case for me after general talks. Does that happen to you? I think I managed to get across everything I wanted to (see the previous post) and it was a nice complement … Click to continue reading this post
I’m going to try to tell you a bit about a few of the talks (physics and otherwise) that I’ve seen here at Aspen, but not now. I’ve got rather a lot to do right now…. But I will try later in the week. In the meantime, here is a … Click to continue reading this post