Author Archive

Can single-world interpretations of quantum theory be self-consistent?

Posted in The Universe and Stuff with tags , on May 4, 2016 by telescoper

I saw a provocative-looking paper on the arXiv the other day (by Daniela Frauchiger and Renato Renner)  with the title Single-world interpretations of quantum theory cannot be self-consistent. No doubting what the authors think!

Here’s the abstract:

 According to quantum theory, a measurement may have multiple possible outcomes. Single-world interpretations assert that, nevertheless, only one of them “really” occurs. Here we propose a gedankenexperiment where quantum theory is applied to model an experimenter who herself uses quantum theory. We find that, in such a scenario, no single-world interpretation can be logically consistent. This conclusion extends to deterministic hidden-variable theories, such as Bohmian mechanics, for they impose a single-world interpretation.

Since this is a subject we’ve had interesting debates about on this blog I thought I’d post a link to it here and see if anyone would like to respond through the comments. I haven’t had time to read it thoroughly yet, but I do have a bit of train travel to do tomorrow…

 

Farewell to Whitchurch..

Posted in Biographical, Mental Health with tags , , on May 4, 2016 by telescoper

One of the things that happened over the Bank Holiday Weekend was the closure of Whitchurch Hospital on April 30th 2016. I read about this here, from which source I also took the photograph below:

Whitchurch-Hospital-2

Whitchurch Hospital was built in 1908 and was originally known as Cardiff City Asylum. After over a hundred years of providing care for the mentally ill – including soldiers treated for shell shock in two world wars – the remaining patients have now been transferred to a brand new psychiatric care unit at Llandough.

It was strange reading about the closure of Whitchurch Hospital. Having spent more time myself there than I wish I had, including an extended period an acute ward, I never thought I would feel nostalgic about the place. Quite apart from the fact that it looked like something out of a Gothic novel, it was in dire need of refurbishment and modernisation. Looking back, however, I have the greatest admiration for the staff who worked there and deep gratitude for the patience and kindness they showed me while I was there.

The first extended period I spent in a psychiatric institution, back in the 1980s, was in Hellingly Hospital in Sussex. That place also had something of the Hammer House of Horror about it. I was completely terrified from the moment I arrived there to the moment I was discharged and don’t feel any nostalgia for it at all.  When I recently looked at what it is like now – derelict and decaying – it gave me more than a shudder.

 

50 Years of the Astronomy Centre at the University of Sussex

Posted in Uncategorized with tags , , on May 3, 2016 by telescoper

It is my pleasure to share here the announcement that there will be a  special celebration for the 50th Anniversary of the Astronomy Centre at the University of Sussex whose first students began their studies here in 1966.

Lord Martin Rees – Astronomer Royal, Fellow of Trinity College, Cambridge, Past President of the Royal Society and Sussex Honorary – will be joining alumni and other former faculty for the celebratory lunch and has kindly agreed to deliver a short speech as part of the event.

Organised by the Astronomy Centre and the Development and Alumni Office, and supported by the School of Mathematical and Physical Sciences , this celebration is open to all former students and their partners. Please make a note of the date and time:

Date: Saturday 15th October 2016
Venue: 3rd Floor, Bramber House, University of Sussex
Time: 12 – 3pm
Cost:  £20 per person, to include lunch and refreshments

You can book online here to secure your place(s).

We are very much looking forward to welcoming you back to campus to share in the celebrations. If you are in touch with other alumni or faculty from Sussex who have connections with the Astronomy Centre, please let them know!

Afterwards, by Thomas Hardy

Posted in Poetry with tags , , , on May 3, 2016 by telescoper

When the Present has latched its postern behind my tremulous stay,
And the May month flaps its glad green leaves like wings,
Delicate-filmed as new-spun silk, will the neighbours say,
“He was a man who used to notice such things”?

If it be in the dusk when, like an eyelid’s soundless blink,
The dewfall-hawk comes crossing the shades to alight
Upon the wind-warped upland thorn, a gazer may think,
“To him this must have been a familiar sight.”

If I pass during some nocturnal blackness, mothy and warm,
When the hedgehog travels furtively over the lawn,
One may say, “He strove that such innocent creatures should come to no harm,
But he could do little for them; and now he is gone.”

If, when hearing that I have been stilled at last, they stand at the door,
Watching the full-starred heavens that winter sees,
Will this thought rise on those who will meet my face no more,
“He was one who had an eye for such mysteries”?

And will any say when my bell of quittance is heard in the gloom,
And a crossing breeze cuts a pause in its outrollings,
Till they rise again, as they were a new bell’s boom,
“He hears it not now, but used to notice such things”?

by Thomas Hardy (1840-1928).

 

Flowers in Bute Park

Posted in Uncategorized on May 2, 2016 by telescoper

On  my way back to Brighton after a weekend in Cardiff. I would have lingered for more of this bank holiday Monday but the trains are running to a weird timetable and I didn’t want to get back too late.

Anyway, in lieu of a proper post here’s a picture I took of some of the spring  flowers in Bute Park on Saturday.

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R.I.P. Harry Kroto (1939-2016)

Posted in Biographical, The Universe and Stuff with tags , , , , , , on May 1, 2016 by telescoper

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I heard earlier this afternoon of the death at the age of 76 of the distinguished chemist Sir Harry Kroto.

Along with Robert Curl and Richard Smalley,  Harry Kroto was awarded the Nobel Prize for Chemistry in 1996 for the discovery of the C60 structure that became known as Buckminsterfullerene (or the “Buckyball” for short).

Harry had a long association with the University of Sussex and was a regular visitor to the Falmer campus even after he moved to the USA.

I remember first meeting him in the 1988 when, as a new postdoc fresh out of my PhD, I had just taken over organising the Friday seminars for the Astronomy Centre. One speaker called off his talk just an hour before it was due to start so I asked if anyone could suggest someone on campus who might stand in. Someone suggested Harry, whose office was  nearby in the School of Molecular Sciences (now the Chichester Building). I was very nervous as I knocked on his door – Harry was already famous then – and held out very little hope that such a busy man would agree to give a talk with less than an hour’s notice. In fact he accepted immediately and with good grace gave a fine impromptu talk about the possibility that C60 might be a major component of interstellar dust. If only all distinguished people were so approachable and helpful!

I met him in campus more recently a couple of years ago when we met to talk about some work he had been doing on a range of things to do with widening participation in STEM subjects. I remember I had booked  an hour in my calendar but we talked for at least three. He was brimming with ideas and energy then. It’s hard to believe he is no more.

Harry Kroto was a man of very strong views  and he was not shy in expressing them. He cared passionately about science and was a powerful advocate for it. He will be greatly missed.

Rest in peace, Harry Kroto (1939-2016)

Final training for May Day Beard Waggle

Posted in Uncategorized on April 30, 2016 by telescoper

Just a week after the London Marathon there’s even more serious action in store tomorrow…

kmflett's avatarKmflett's Blog

Beard Liberation Front
PRESS RELEASE 30th April
Contact Keith Flett 07803 167266

FINAL TRAINING FOR MAY DAY BEARD WAGGLE

Keir Hardie May Day

The Beard Liberation Front, the informal network of beard wearers, has said that training for the ancient May Day tradition of Beard Waggling has reached its final day around the UK.

The beard waggle involves shaking the beard vigorously from side to side and in doing so stimulating air currents that can cause objects to levitate slightly.

The tradition is believed to originate in late medieval times, and was designed to underline the new Spring growth of facial hair and with it the hope of change and renewal represented by May Day itself

The BLF traditionally asks its supporters, on the traditional London May Day march from Clerkenwell Green, to waggle their beards individually or collectively as the mood takes them to celebrate the arrival of Spring and to strike a…

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Boole, Shannon and the Electronic Computer

Posted in Uncategorized on April 30, 2016 by telescoper

A reblog to mark the centenary of the birth of Claude Shannon, pioneer of information theory..

thonyc's avatarThe Renaissance Mathematicus

Photo of George Boole by Samuel Prout Newcombe  Source: Wikimedia Commons Photo of George Boole by Samuel Prout Newcombe
Source: Wikimedia Commons

In 1847, the self-taught English Mathematician George Boole (1815–1864), whose two hundredth birthday we celebrated last year, published a very small book, little more than a pamphlet, entitled Mathematical Analysis of Logic. This was the first modern book on symbolic or mathematical logic and contained Boole’s first efforts towards an algebraic logic of classes.

6882068-M

Although very ingenious and only the second published non-standard algebra, Hamilton’s Quaternions was the first, Boole’s work attracted very little attention outside of his close circle of friends. His friend, Augustus De Morgan, would falsely claim that his own Formal Logic Boole’s work were published on the same day, they were actually published several days apart, but their almost simultaneous appearance does signal a growing interest in formal logic in the early nineteenth century. Boole went on to publish a much improved and expanded…

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An interview with Alfredo Carpineti

Posted in LGBTQ+, Uncategorized on April 29, 2016 by telescoper

Ooh. I’ve just noticed this so thought I’d reblog it.

Dr Carpineti did the London Marathon last weekend too!

phdgeekbeth's avatarLGBTQ+ STEM

Current Job:  Science JournalistAlf

Scientific Discipline/Field: Astrophysics

Country: UK

Pick some letters (L,G,B,T,Q etc.): G

LinkedIn: www.theastroholic.co.uk

What does your job involve?

I work for ‘I fucking Love Science’. I write three articles a day about new research being published, mainly on physics and astrophysics.

How did you get to this job (education etc.)?

I have a B.Sc. from La Sapienza, Rome, an M.Sc. in quantum fields and fundamental forces and a Ph.D. in astrophysics both from Imperial College London.

Do you feel being LGBT has affected your career decisions?

Yes, I felt I couldn’t really be myself in Italy so I decided to move to London to continue my studies.

Have you had any reactions from colleagues about being LGBT, either good or bad?

The reactions to my sexuality have mostly been good. I’ve never had a bad reaction personally, but I know of somebody, another Ph.D…

View original post 84 more words

Happy Retirement, Diane Greening!

Posted in Uncategorized on April 29, 2016 by telescoper

Yesterday’s retirement do reminded me that I had neglected to mention another retirement, this time from the Science and Technology Facilities Council.

Diane Greening is retiring at the end of this month from her position at STFC where, among many other things, she provided valuable support and guidance to the Astronomy Grants Panel. I’ve served on that panel myself and I can tell you it’s no picnic, not least because there’s just not enough money to go around so many applicants are bound to be disappointed. Those long and difficult meetings in Swindon would have been even tougher without the patience and good humour of the office team, especially Diane.

I’m sure I speak for everyone in the UK Astronomy community when I say thank you to Diane for her sterling service at STFC and wish her a very long and very happy retirement!