Category Archives: work

CDF Says No

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Recall the excitement last week about the D0 result? I wrote a post called “An Exciting Asymmetry?”. Well, there’s a rule that says if you write a title as a yes/no question, the answer is often (usually?) “No”.

Sure enough. over at Resonances, Jester reports that the CDF experiment, also at the Tevatron, has looked for a confirmation of the CP violating result that D0 claimed to see, and did not find anything abnormal where it should have. Find further details (on the technical side for the experts) and links at that post, which, as is usual with material from that blog, is well-written and interesting.

This is one reason why we (the particle physics community) build multiple detector/experiments on the same accelerator machine, and this is a prime example […] Click to continue reading this post →

Nostalgia

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aollogoAOL is 25 years old today! Twenty Five! To help you understand that, those of you who where alive then click here for the list of number one songs in the charts at the time… Yes, Wham!, Tears for Fears, Huey Lewis and the News, Phil Collins, Jan Hammer, etc… Do you remember America Online? Dialing up to connect? (Perhaps some of you still dial up, to read this blog?) Ah yes, memories. I was never an AOL subscriber. I was, after all, not in America until the 90s, and only started connecting from home in that decade. By then several companies offered dialup service. Then I was of course, just like everyone else, familiar with the reassuring dialup noises to the point where by ear you could tell if the connection was going to work or not (huh, I just realized that sound is sort of from the same swatch of sounds as the TARDIS noise), and recall the sitting and waiting for files of just a few hundred kilobytes to download, and so on and so forth. (Amazingly, and wonderfully, we are now at the point where people are streaming movies and tv shows directly to their homes on their web connections.) The speed difference became a way of measuring the difference between work and home, in a way. At work, you had tons of storage space and perpetual connectivity, and once got home that went away. So waiting for data to squeeze through the telephone line using dialup was extra frustrating.

Truth be told, there’s a piece of me that does not mind that difference, at times. Being connected all the time at home – fast and conveniently – can bring down the […] Click to continue reading this post →

An Exciting Asymmetry?

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A big mystery in physics is why there is more matter than anti-matter. (Of course, which we call the matter and which we call the “anti-matter” is a… matter of convention. Take your pick.) It is hoped that there is some mechanism in the laws of physics (at a very basic level concerning particle interactions) that will become apparent that explains it. It’s also hoped that the mechanism itself might have some understandable origin too. The mechanism would operate in the first tiny fractions of a second of the universe’s life when the primordial soup of particles and antiparticles (created from, roughly speaking, the energy of the big bang) began to cool down as the universe expanded. Rather than them annihilating all back into energy again, the mechanism would create an imbalance between the two, giving rise to a matter-filled universe, from which we emerged. So what could be the mechanism, can we isolate it in our theories and in our experiments? Build a good model of it? Explain it?

This is all very first and foremost in people’s minds when there’s a new experiment switched on that is probing the unknown – the Large Hadron Collider. Well, actually, it has been recently announced that a suitable mechanism (or, more precisely, its […] Click to continue reading this post →

But is it Real? (Part One)

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After my colloquium at UC Riverside some weeks back, I was asked an important question I’ve been asked before, and no doubt will be asked again. The same question may have occurred to you given things I’ve written here about the subject of my research concerning applications of string theory (particularly, ideas from quantum gravity) to understanding (relatively) recent experimentally measured phenomena. (The technique of “gauge/gravity dualities”: See also the special Physics Today May issue with articles on all of this. I wrote about that here. It tells you some of what we can and can’t do with the computational technology, and prospects for improvement, etc.)

So the question is “Is it real?”. This is particularly referring to the black hole in the discussion. Recall, one computes properties of new novel liquid phases of matter (that seem to be closely related to what shows up in the lab) by using a toolbox that involves the equations of gravity, in a higher dimensional spacetime, and much of the thermal nature of the system is controlled by a black hole solution of those equations. So people want to know if that black hole is real. A version of the conversation is like this: (Imagine I’ve already introduced the technique, the higher dimensional spacetime, and the black hole…)

[…] Click to continue reading this post →

The Search For Perfection…

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…is all very well, but to look for Heaven…is to live here in Hell*.

may 2010 physics today coverOne of the things I worked a lot on in earlier months this year (and late ones of last year) was the lead article in a cluster of articles that has appeared in the last few days in May’s special edition of Physics Today. They are sort of departmental-colloquium-level articles, so for a general physics audience, more or less. It’s about some of the things I’ve told you about here in the past, concerning exciting and interesting applications of string theory to various experiments in nuclear physics, as well as atomic and condensed matter physics (although we do not have an article on the latter in this cluster). I had a fun time working with Peter Steinberg on the article and remain grateful to him for getting us all together in the first place to talk about this topic way back in that AAAS symposium of 2009. It was there that Steven Blau of Physics Today got the idea to approach us all to do an article, which resulted in this special issue.

My article with Peter Steinberg, “What black holes teach about strongly coupled particles “, is here, and the pdf is freely downloadable (update: alternative link here). It is mostly about the theoretical aspects of the whole business and the relevance of the string theory […] Click to continue reading this post →

Odds and Ends

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angels_flightThe little railway on the left is apparently the shortest rail journey in the world. So the sign proudly claims, anyway. I imagine they mean shortest for one carrying passengers, and that considerations of scale have been made (so that model railway that loops around your dining room table does not count). Whether it is the shortest or not, Angel’s Flight is very charming and quite a lovely, brief ride (shot of interior below). I recommend visiting it if you get a chance. It’s in downtown Los Angeles. A reward at the end is Grand Central Market, so you can’t lose.

I’ve been quiet here on the blog for a few days. It has been an oddly busy time where on the one hand I’ve been trying to work on my project, and on the other I’ve been […] Click to continue reading this post →

Tales From The Industry XXXI – An Extra Dimension

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I went off into an extra dimension yesterday. Well, in a manner of speaking. No, this was not anything to do with my string theory work!

I was being filmed in 3D.

3d_cameraThere’s a bit of a 3D revolution going on. There have been a lot of 3D movies out lately. Some are better than others, and a great deal more are to come very soon, as you probably know. Many major filmmakers that you probably regard as “serious” filmmakers have 3D films in the works. There’ll be 3D TV channels appearing soon in the UK and probably elsewhere, and they’ve been selling the TVs already, both there and in the USA (and I imagine, in other places).

There are lots of questions you’ve no doubt asked yourself: Is the technology here to stay? Is it just a gimmick? Is it just a ploy to combat piracy? Is it a new aspect of the visual form that creative filmmakers can genuinely use to enhance the story-telling? Has that happened yet? And so on and so forth…

I’ve been asking myself those questions too. I did not expect, however, to be part of the revolution (if that is what it is) and be filmed in 3D, so soon, for a TV show. My […] Click to continue reading this post →

And So It Goes…

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bottega_louie_2So it has been a quiet week or few in my immediately local world. This is by choice. Recall that I’m on sabbatical, and working on a project. I’m trying to work on it exclusively, but I keep getting interrupted by several other things, especially since I returned from Walkabout.

But I do what I can, saying no to some things, doing some duties where I am needed, and tending somewhat to my private life and friendships of course. But mostly I’ve been hiding and working on the project. Overall, I can report that I’m very pleased with progress in the last month (since I returned to LA) on several aspects of the work. I’m sorry that I have not – and still will not – tell you anything about the project. I’ve already given my reasons, and nothing has changed. Perhaps later.

Most of my work has been in Away mode, which means at offices other than the one assigned to me at work. I am certainly staying away from the department as much as I can, (no disrespect intended, but people find things for you to do if you’re perceived as being around – I am not around!), and the same goes for the campus, making only fleeting visits to the latter, mostly in stealth mode (my obligatory sabbatical beard, among other things, has helped here). Sometimes I appear for a […] Click to continue reading this post →

Riverside Fun

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(Note: Written yesterday afternoon at 6:00pm.) Well, that was fun! I am on my way back from UC Riverside where I visited to give a colloquium. I met a number of faculty that I had not seen since I was last there (talking at a DPF APS meeting in 2004) and people seemed to like the talk (similar to the ones I gave last Fall in LA and in Vancouver), even though I was a bit rusty in my talk-delivery, being deep in sabbatical mode, you understand. I wallowed too much in the experimental physics part of the talk and so had to rush the ending bits where I bring in aspects of string theory to the game. I hope people were not too confused. I invited people to send me email for more information/explanation if they wanted to, since I had to leave immediately after my talk.

You might be wondering why I am typing while I’m driving on the highway. Isn’t that bad? I could respond that texting while driving is illegal but blogging while driving is perfectly fine (along with things like eating, shaving, applying makeup, and a host of other things you see people doing in cars, some of which I won’t mention as this is a family blog). However I won’t make such a silly response since of course I am not driving. I took the train. Yes, I’m weird. It’s a very fine double-decker (actually there […] Click to continue reading this post →

New LHC Physics Phase Begins!

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cern-first-physicsWell, here we go. It has been a little over 20 years since I’ve been actively working in this field and have been hearing about the promise of this machine, the Large Hadron Collider (LHC), and now it is really here, working, and colliding protons at an energy much higher than any previous experiment, promising us to a glimpse of new aspects of how the universe works. It is not guaranteed, of course, but there’s a great deal of hope, and so much of what we know strongly suggests that there’s going to be some exciting things to learn. See the list of related posts below for several bits of background on the LHC, or go to CERN’s website. [Image above right -click for larger view- is a CERN-supplied montage of data/images from the various experiments at the LHC. Caption: 7 TeV collision events seen today by the LHC’s four major experiments (clockwise from top-left: ALICE, ATLAS, CMS, LHCb).]

Two of the things foremost in people’s minds are on one hand the Higgs (the particle or particles that ultimately give masses to the elementary particles that make up the […] Click to continue reading this post →

A Return

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gladioliI find myself back in Los Angeles for a bit, putting Walkabout mode on pause. Perhaps to do my laundry, perhaps to chair the committee of the upcoming Ph.D. defense of my student, Tameem, perhaps to be able to sit outside in the early morning sun in a T-shirt and blog over breakfast.

The garden is full of weeds and flowers, and all is well with the world, albeit a bit blurry due to my jetlag.

Anyway, a few random things to note:

* * *

mourning_dovesAnother Spring is here, in full force. I once again snort in exasperated laughter at the bizarre claim so very many people make about Los Angeles (Southern California more generally) not having seasons, as I marvel at all the many signs of it screaming for attention. As a random example, I’m observing some mourning doves eyeing me up from nearby as they try to decide whether I’m a threat to their potential nesting sites that they are checking out. Seems that at least one pair is rather impressed with my cluster of strelitzia nicolai and want to move in. I want to tell them that I’m not the problem, but the fact that they’d be in plain sight of the crows/rooks/ravens/winged-Nazgul that pass by here a lot will be. I’ve seen them strike nests in those trees from previous years and scoop up a tasty warm meal.

* * *

Eight hours of jetlag means only one thing: […] Click to continue reading this post →

Road Benefits

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I’ve been on the road for a while now (see the last several posts, e.g. here), and it has been good for me. Why? Well, I think that it has been good to get out of some of the routines that I normally find myself in, and have a change of perspective. This feeds my thoughts about things, whether it be work-related, play, or personal life. So being in a mode where I’m living out of a suitcase and moving from location to location helps me simplify somewhat. Work has been good. Some aspects have not been as efficient as they might have been were I in my home office or in my office at USC, but efficiency is not really the point. There’s plenty of time for that later, and in travelling mode, the value of the high quality reflection about the work I’m doing or an approach I’m going to take on the project I’m working on is something I’d not trade for the equivalent time sitting in my office being highly efficient at some task.

So where am I? Well, I’m a month into hardcore sabbatical time (recall that the first […] Click to continue reading this post →

Dessert Coffees

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three_coffeesThese are not really my cup of tea (at least not first choice), so to speak, but they are very pretty.

While working at the countertop of a coffee bar at Mercado San Miguel, in Madrid, (drinking my usual café cortado) I watched the fellow at the counter making them for some customers.

It was a rather elaborate process, and quite fascinating to watch. It might seem odd […] Click to continue reading this post →

Waterfall

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My Walkabout finds me in Madrid for a little while, and I find myself reporting joyfully on rain, once again. Not because it has been raining an unusual amount here, but because of a production I went to the other night. It was primarily a dance event, celebrating and dramatizing the work of poet Frederico Garcia Lorca during his time in New York in the 1920s. The choreography was by (I’ve forgotten… will find ticket and update shortly) [update: Blanca Li. Title: ¨Poeta en Nueva York¨] with flamenco as the primary form, mixed with several other dance traditions. dance_theatre_stillThere was a lot of good and enjoyable work to see, but I’ll admit to being blown away by the theatre’s (and associated production staff’s) ability to suddenly create a rainstorm on the stage, and sustain it for a prolonged period while one of the dances (using the water, as you can see) used it to great and stunning effect. I had to sneak a (no flash and no disturbing of neighbours of course) photo for you. Click for larger view.

A bit like the first time you saw Jurassic Park back when it was first released and utterly groundbreaking visually, I (and maybe you?) spent time thinking, “this is amazing!”, “how did they pull off this illusion?”, before concluding that maybe the […] Click to continue reading this post →

Hideouts

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library_i_like

One of the things I tend to do when on Walkabout is seek out pleasant public spaces in which to work. Sometimes institutions to which I might have some connection might give me access to a guest office, or something similar, but often I go “off the grid”, where the grid here refers to the network of academic connections and arrangements that produces such (generous and vital) courtesies. So every city I spend time in, I try to work build a personal network of hideouts. Sometimes, these are just favourite cafes of one sort or another (you’ve maybe seen posts on those), but at times it can also be libraries or other spaces at one sort of institution or another. Some of them are quite splendid, or simply pleasant or convenient. Among the examples for me are the Santa Monica public library, the (downtown) Los Angeles public library (yes, even close to home I like to get away from my standard offices), the Butler Library at Columbia University in New York, the New York Public Library […] Click to continue reading this post →