Archive for University of Sussex

A Rambling Post

Posted in Biographical, Maynooth with tags , , , , on March 15, 2018 by telescoper

Thursdays are busy days for me, starting with a 9am lecture on Computational Physics in Physics Hall, followed in the afternoon by a two-hour laboratory session on the same subject. Today we did exercises root-finding and numerical integration, but didn’t get through as many examples as I had hoped. In between I had a number of jobs to do, including a lunchtime meeting off campus with my landlord to pay the rent (which he collects in person). I was a bit late back for the lab and, after apologizing, complained that I was too old for all this running around. One of the students kindly said that `age is only a number’. I replied `I know, but unfortunately in my case it’s a rather large one..’

I now have a big of a break from teaching in Maynooth. There is no teaching next week as it is `Study Week’ and Monday 19th March is a public holiday (for St Patrick’s Day, 17th March, which this year falls on a Saturday). Study week is followed by a week’s holiday because of Easter. Teaching resumes here on Tuesday April 3rd. Somewhat surprisingly the Easter break here is shorter than in the UK.

The four-week batch of strikes in UK universities over pensions in which I have been participating ends tomorrow, which means that I will be lecturing in Cardiff again next Tuesday (20th March). This lecture will be Lecture 8 of 11, with lectures 5, 6 and 7 missing in action (industrial action, to be precise). Cardiff students are then on vacation for three weeks for the Easter break, with lectures resuming on 16th April. All of this means that for the next three weeks I won’t have to do the mid-week trip from Cardiff to Maynooth (which I am beginning to find rather tedious). I plan to stay all next week in Wales and return to Ireland the following week, as I have been invited to give a seminar then at the Dublin Institute for Advanced Studies (which I have never visited before).

Anyway, all that rambling just serves to illustrate that it’s a complicated business being in a superposition of jobs. I’m looking forward to the summer, when my wavefunction will collapse onto Ireland (if I haven’t collapsed from exhaustion before that).

To end on a very sad note, I heard today that Emeritus Professor David Bailin passed away yesterday. I knew David from both times I was at Sussex (as a graduate student and postdoc in the 1980s, and as Head of School of Mathematical and Physics Sciences from 2013 to 2016). He was a very fine theoretical physicist and a very nice man who was held in a very high regard by all who worked with him. Condolences to his family, friends and colleagues.


The Future is Unpredictable

Posted in Biographical, Cardiff, Maynooth with tags , , on January 31, 2018 by telescoper

I decided to take the early morning flight from Cardiff to Dublin today as I have quite a few things to prepare before my first lecture at Maynooth, which is at 9am. I actually got up at 4am and took the 5.10am bus to the airport so that I would arrive in time to have a coffee and a bacon sandwich before the 6.55am flight. Everything went to plan apart from the inclement weather, which resulted in me getting soaked on the way to the bus stop. The plane struggled against a strong headwind, taking 70 minutes to get to Dublin instead of the usual 40, and there was quite a lot of turbulence en route but we arrived on time in Dublin in time for my bus to Maynooth. It was freezing cold this morning, and as I arrived in Maynooth it started snowing but has now stopped.

While waiting in the airport I checked Facebook, which reminded me that it was exactly five years ago today that I left Cardiff to take up the job of Head of Mathematical and Physical Sciences at the University of Sussex. One of my last acts was to sign the work of art I left on the whiteboard in my old office.

The initial term of my appointment at the University of Sussex was 5 years, which would have been finishing today had I stayed there. If somebody had told me then that within five years I would have left Sussex, returned to Cardiff temporarily, and be about to move permanently to Ireland it would have seemed most implausible. More importantly, way back then I had no plans to grow a beard!

It just goes to show that Niels Bohr was right when he stated that `Prediction is very difficult, especially about the future’….

..on the other hand, when I got back to Maynooth I found that my new Public Services Card had arrived, which seems to make a definite prediction of the date of my ultimate demise:

Hic Sunt Leones

Posted in The Universe and Stuff with tags , , , , , , on November 15, 2017 by telescoper

Just time for a very quick post, as today I travelled to Brighton to attend an inaugural lecture by Professor Antonella De Santo at the University of Sussex.

Antonella was the first female Professor of Physics at the University of Sussex and I’m glad to say she was promoted to a Chair during my watch as Head of the School of Mathematical and Physical Sciences, at Sussex. That was about four years ago, so it has taken a while to arrange her inaugural lecture, but it was worth the wait to be able to celebrate Antonella’s many achievements.

The lecture was about the search for physics beyond the standard model using the ATLAS experiment at the Large Hadron Collider, with a focus on supersymmetry and possibly candidates for dark matter. It was a very nice lecture that told a complex story through pictures and avoiding any difficult mathematics, followed by a drinks reception during which I got to have a gossip with some former colleagues.

The title, by the way, stems from the practice among mediaeval cartographers of marking terra incognita with `Here be lions’ or `Here be dragons‘. I hasten to add that no lions were harmed during the talk.

Anyway, it was nice to have an excuse to visit Brighton again. The last time I was here was over a year ago. It was nice to see some familiar faces, especially in the inestimable Miss Lemon, with whom I enjoyed a very nice curry after the talk!

Now for a sleep and the long journey back to Cardiff tomorrow morning!


R.I.P Leon Mestel (1927-2017)

Posted in Biographical with tags , , on September 18, 2017 by telescoper

Leon Mestel FRS, photographed by Lucinda Douglas-Menzies

I heard this weekend the very sad news that on Friday 15th September 2017, we lost one of our great astrophysicists. Professor Leon Mestel FRS, pictured abvove, passsed away, peacefully in his sleep, at Addenbrooke’s Hospital. He was 90 years old.

Leon Mestel was a scientist of the highest distinction. Elected a Fellow of the Royal Society in 1977, his research interests were very broad, encompassing, but not restricted to, the areas of star formation and structure, especially stellar magnetism and astrophysical magnetohydrodynamics. Among his contributions in other areas were important papers on gravitational collapse and equilibrium in the context of galaxy dynamics, of which the classic `Mestel Disk’ is just one example. He has been awarded both the Eddington Medal (1993) and the Gold Medal (2002) of the Royal Astronomical Society. He had great physical insight which was backed up with prodigious mathematical skill and an encyclopedic knowledge of astrophysics. He also had great powers of concentration and the determination to tackle the kind of extremely challenging problems that scared off lesser intellects. Leon  was an ‘old school’ theoretical astrophysicist who was held in very high regard across the astrophysics community, and he will be greatly missed.

Others more expert than me will be able to pay proper tribute to his scientific work, so I’ll restrict myself here to a few personal reminiscences.

Leon Mestel was Professor in the Astronomy Centre at the University of Sussex when I joined it to start my DPhil in 1985. We new postgraduate research research students were required to take four courses on various aspects of astronomy, and pass oral examinations on them, before being allowed to progress beyond the first year. One of these courses was a course on Stellar Structure, taught by Leon Mestel. His lectures were pretty intense – and, I have to say, not made any easier to understand by his truly terrible handwriting on the blackboard! – but I learned a huge amount from them. I still have the lecture notes I took, in fact.

I had a root around in my old files this morning and found this evidence that I once knew something about stars!

All of us found Leon very scary to start with. He was intellectually quite intimidating and seemed to be a rather fierce and irascible character. That opinion changed when, a few weeks into term, he invited us to his house in Lewes for a social evening. We were all a bit nervous on the way there, unsure of what to expect, but as it turns out Leon was a marvellously entertaining and avuncular host. He had a wicked sense of humour and a seemingly inexhaustible stream of jokes, across a spectrum from groan-worthy puns to very risqué stories, including a  liberal measure of archetypal Jewish humour.  Leon’s father was a Rabbi, actually.  That evening broke the ice and we all realised that the was one of the good guys. That he came across as grumpy sometimes was because he was concentrating very hard, but it was rather easy to make him laugh and bring that twinkle to his eye that we will all remember.

His sharp brain and very broad knowledge meant that Leon could spot bullshit at a  considerable distance and, while he often seemed to be snoozing through  our weekly seminar,  he invariably woke up at the end and asked a penetrating question. Since one of his main interests was the role of magnetic fields in astrophysics, a subject that sends many astrophysicists screaming from the room, he would often choose something about magnetism as a question. When I was there his main focus was on the fiendishly difficult problem of building a self-consistent model of the pulsar magnetosphere. He was, however, genuinely interested in all branches of astrophysics and always recognised good work when he saw it, especially from younger scientists.

During my time as a PhD student I had some problems that required me to take quite a lot of time off. Leon was extremely kind and supportive during this period, and he even bent the rules a bit to avoid putting me through the formal process of interrupting my studies. When I was back at work and just about finishing my thesis in 1988 it was Leon who came to see me in person, with a big smile on his face, and offered me a postdoctoral position at Sussex to follow my graduate studies. I nearly fell off my chair with surprise and gratitude.

After I joined the staff later in 1988, it became a bit of a ritual for us to visit the Senior Common Room (which was situated in what is now Bramber House) for lunch, followed by coffee. It turned out that Leon liked to do the Times crossword with his post-lunch coffee. He wasn’t at all averse to a collaborative effort on tricky research problems, and it was thus with crosswords too. We both preferred the Guardian puzzle, actually, but he saved that one for after work and did the Times one because the paper was provided free in the SCR. There was also a Chambers dictionary.

I left Sussex in 1990 and Leon retired in 1992. I didn’t see as much of him after that, except for the occasion when he and my former DPhil supervisor John Barrow organized a meeting in 2004 about Eddington at which I was honoured to be asked to give a talk about the 1919 eclipse expeditions. That was a very nice occasion at which Leon was in sparkling form. Thereafter I saw him occasionally at the RAS Club, but in recent years he didn’t come so often as he found it increasingly difficult to get around.

Leon Mestel was not only a great astrophysicist but also a great character.  I’m so very sorry I can’t attend his funeral (which is being held tomorrow), but I send heartfelt condolences to his family, friends and colleagues.

Rest in Peace Leon Mestel FRS (1917-2017)



A Blueprint for a Quantum Computer

Posted in The Universe and Stuff with tags , , , , on February 16, 2017 by telescoper

I’m a little bit late blogging about this topic, as it relates to a paper published on 1st February 2017, but it’s a pleasure to be able to draw your attention to an important paper by a group led by a former colleague of mine from the University of Sussex, Prof. Winfried Hensinger, known to his friends as “Winni”. In essence they have constructed a practical way to build a working quantum computer.

Here is the abstract of the latest paper which explains the significance of the work:

The availability of a universal quantum computer may have a fundamental impact on a vast number of research fields and on society as a whole. An increasingly large scientific and industrial community is working toward the realization of such a device. An arbitrarily large quantum computer may best be constructed using a modular approach. We present a blueprint for a trapped ion–based scalable quantum computer module, making it possible to create a scalable quantum computer architecture based on long-wavelength radiation quantum gates. The modules control all operations as stand-alone units, are constructed using silicon microfabrication techniques, and are within reach of current technology. To perform the required quantum computations, the modules make use of long-wavelength radiation–based quantum gate technology. To scale this microwave quantum computer architecture to a large size, we present a fully scalable design that makes use of ion transport between different modules, thereby allowing arbitrarily many modules to be connected to construct a large-scale device. A high error–threshold surface error correction code can be implemented in the proposed architecture to execute fault-tolerant operations. With appropriate adjustments, the proposed modules are also suitable for alternative trapped ion quantum computer architectures, such as schemes using photonic interconnects.

Here’s a short video explaining the setup

This result has generated a lot of good publicity for the group at Sussex, including a piece in the Financial Times and a personal appearance by Winni himself on Sky News.

It’s great to see the  Ion Quantum Technology group continuing to do really well and I’m sure the investments made in physics research at the University of Sussex over the last few years will bring even more exciting developments in the near future!



A New Head for the Old School

Posted in Biographical, Education with tags , , on December 13, 2016 by telescoper

Just a brief post to pass on the news (which I just heard this morning) that the University of Sussex has now formally announced that Professor Philip Harris will be taking over as Head of the School of Mathematical and Physical Sciences at the University of Sussex, the position I held until this summer.

I worked a lot with Philip during the time I was at Sussex as he was Head of the Department of Physics & Astronomy for part of that period. I’m sure he’ll do a great job and I wish him – and indeed the whole School – all the very best for the future!

Incidentally, the news item announcing Philip’s appointment contains the following snippet:

Both departments are ranked first in the UK for graduate prospects in the Times and Sunday Times University Guide 2017 (Destinations of Leavers from Higher Education Survey, 2015-16), with 100% of Mathematics BSc students being in work or further study within six months.

I wasn’t aware of this interesting news before today, and I’m sure it will provide a boost to the School’s efforts in the currently rather challenging student recruitment market. Of course Philip Harris can now take credit for anything good that happens to the School, whereas if anything goes wrong he can always blame it on the old Head of School!



Three Cheers for Three Chairs!

Posted in Uncategorized with tags , , , on November 2, 2016 by telescoper

Just a quick post to say public congratulations to three of my former colleagues in the Department of Physics and Astronomy at the University of Sussex.

My spies tell me that the following have recently been promoted to Professorial positions:

  • Kathy Romer (now Professor of Astrophysics) – Kathy is principal investigator of the XMM Cluster Survey collaboration and is coordinating cluster research for the Dark Energy Survey project.
  • Antony Lewis (now Professor of Cosmology) – Antony works on theoretical models of the early universe, as well as comparing observations with cosmological models, and is part of the core team analysing data from the Planck satellite.
  • Jacob Dunningham (now Professor of Physics)  – Jacob is Head of the Atomic Molecular & Optical (AMO) Physics group at Sussex  and works on quantum mechanical entanglement spans the fields of quantum information, quantum optics, Bose-Einstein condensation, and metrology.

As former  Head of School  I knew these were in the system but I left before the somewhat laborious promotions process was completed, so it’s very nice to receive confirmation that they all went through.

P.S. Extra-special congratulations to Kathy, because she was born on Tyneside (i.e. not in the Midlands).