Category Archives: General

Can the electron wave function be trapped and divided?

Divide and conquer: the Brown bubble experiment (Courtesy: Mike Cohea/Brown University)

Divide and conquer: the Brown bubble experiment. (Courtesy: Mike Cohea/Brown University)

By Hamish Johnston

Every once in a while we come across a physics story that seems very interesting – but we just don’t know what to make of it. The latest comes in the form of a press release from Brown University in the US and concerns “electron bubbles” in liquid helium.

These bubbles are about 4 nm in diameter and are formed when a free electron moves through liquid helium and repels surrounding atoms. Physicists have been studying these bubbles for decades and in the 1960s they discovered something very strange when firing electrons across a tank of liquid helium and measuring the time it takes the bubbles to reach a detector on the other side.

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Physics World 2014 Focus on Big Science is out now

By Michael Banks

This year has been a special one for the CERN particle-physics lab near Geneva as it turns 60 years old. It was back in 1954 when the CERN convention was ratified by its first 12 member states and the European Organization for Nuclear Research was officially established.

Cover of Physics World 2014 Focus on Big ScienceThe past few months have seen CERN celebrate in style with a whole host of symposia, meetings, plays, films, concerts and other events being held at the lab and at member states across Europe.

Indeed, researchers at CERN have had a lot to celebrate recently, following the discovery of the Higgs boson at the lab in 2012, and they will be hoping for yet more success when the Large Hadron Collider (LHC) switches on next year following a two-year upgrade and maintenance programme.

In the latest Physics World focus issue on “big science” we look at what has been going on at CERN during the shutdown as the lab gears up to hunt new particles beyond the Higgs boson. Once back online, the LHC will be generating even more data than in its previous run and this focus issue also investigates how researchers are going to deal with the huge volumes of information that will be generated at many upcoming facilities, as well the need to train the next generation of researchers to use them.

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The STEM employment paradox, revisited

Orange figures holding up signs that say "hire me"

Unemployment rates among new STEM graduates are higher than average. (Courtesy: iStock/geopaul)

By Margaret Harris

Why, at a time when we hear so much about the UK’s shortage of scientific and technical skills, do unemployment rates among new science graduates remain stubbornly higher than average? This question has been bugging me for some time. Back in 2012, I wrote a blog post about it, suggesting that the answer might be a mismatch between what universities teach and what employers need. But that answer never really satisfied me, so for the graduate careers section in this month’s Physics World, I’ve examined the subject more carefully.

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Working at the interface of physics and biology

Face to face at the interface between physics and biology

Face to face at the interface between physics and biology.

By Michael Bishop

In the 60 years since James Watson and Francis Crick brought physics and biology together to unveil the molecular structure of DNA, the boundary between the two disciplines has continued to become increasingly blurred.

In this post-genomic era, ever more principles from physics have been applied to living systems in an attempt to understand complexity at all levels.

Yet cultural differences still exist between physicists and biologists, as is made clear in a set of excellent perspectives in the journal Physical Biology, published by IOP Publishing, which also publishes Physics World.

In “Perspectives on working at the physics–biology interface”, a group of eminent scientists give their accounts of working at the interface of physics and biology, describing the opportunities that have presented themselves and outlining some of the problems that they continue to face when working across two fields with quite different traditions.

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How to inspire scientists in developing nations

 

By Matin Durrani

I’ve now returned to the UK from my visit to the International Centre for Theoretical Physics (ICTP) in Trieste, which has been celebrating the 50th anniversary of its founding. As part of those celebrations, the ICTP has created a special half-hour video documentary (above), which shows how scientists in various parts of the globe have not only furthered their own careers through visits to the ICTP, but have also used that experience to improve science back in their home countries

The video, which I watched in Trieste, features scientists from everywhere from Nepal to Cuba, from Ethiopa to Peru, and from Cameroon to China – and, of course, Pakistan itself where the ICTP’s founder Abdus Salam was from. Entitled From Theory to Reality: ICTP at 50, it was made by Italian film-maker Nicole Leghissa, who spent two months travelling around the world to the locations seen in the film.

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Who was the real Abdus Salam?

Photo of members of Abdus Salam's family at the International Centre for Theoretical Physics in Trieste

Honouring his achievements – members of Abdus Salam’s family at the International Centre for Theoretical Physics in Trieste.

Matin Durrani in Trieste, Italy

It’s now my third day here at the International Centre for Theoretical Physics (ICTP) in Trieste, which is celebrating its 50th anniversary in grand style. Two days ago we had a marvellous seven-course dinner at Duino Castle, including a hugely spectacular fruit-laden golden-jubilee cake, while yesterday there was a possibly even more sumptuous eight-course dinner hosted by the city that has been home to the centre for half a century.

But pervading all the events has been Abdus Salam, the Pakistani Nobel-prize-winning theoretical physicist who set up the centre in 1964. We know pretty much what Salam did from a scientific point of view, which was celebrated in his 1979 Nobel prize for unifying the weak and electromagnetic forces, but what exactly was he like as a person?

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Quantum dances at the intersection of science and culture

Quantum dancers in action

Quantum dancers in action. (Courtesy: Grégory Batardon/BAM)

By Robert P Crease

I’m fascinated by the interactions between science and culture, which is what led me to the Brooklyn Academy of Music (BAM), which was hosting the US première of a dance piece called Quantum that had previously debuted where it had been created, at CERN. The event was staged in a simple, black-box space, with the audience seated around a square floor in three rows with no proscenium. But it was an upscale black box, with elegant seating upholstered in a blue-and-gold metallic sheen. Four industrial lights were suspended from the ceiling by long cables.

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Physics road trip through the north-east of Brazil

The new IIP building in Natal

Susan Curtis (left), Sarah Andrieu (centre) and Alvaro Ferraz admire the new IIP building in Natal.

By Susan Curtis

This week, several of us from IOP Publishing have been visiting the north-east of Brazil. Our prime focus has been the annual meeting of the Brazilian Materials Research Society in João Pessoa, where we launched a new Science Impact report highlighting materials research in Brazil. But during the week I travelled to Natal with my colleague Sarah Andrieu to visit Alvaro Ferraz, director of the International Institute of Physics (IIP).

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Abdus Salam’s legacy celebrated

Photo of opening session at ICTP 50th-anniversary meeting

Celebrating Salam – Rolf-Dieter Heuer addresses guests at the opening session of the ICTP’s 50th-anniversary conference.

By Matin Durrani in Trieste, Italy

It was a small touch, but certainly quite surprising.

To kick off the opening session of the 50th-anniversary meeting of the International Centre for Theoretical Physics (ICTP), no-one spoke. Instead, the lights were dimmed until the audience was sitting in total darkness. Then emerged the voice of the ICTP’s founding father – the Pakistani theorist Abdus Salam, who died in 1996 – as a film started rolling on the screen at the front of the lecture hall. This was followed by a series of short video messages from selected physicists from around the world who benefited from the support of the ICTP early in their careers. As one physicist put it, the ICTP was “the launching pad” for their career. “It is a rare opportunity that so many people dream about,” added another.

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All eyes on the ICTP as it turns 50

View from the guest house at the International Centre for Theoretical  Physics in Trieste, Italy

Golden days: the view from the guesthouse at the International Centre for Theoretical Physics as delegates arrive for a conference to mark its first 50 years.

By Matin Durrani in Trieste, Italy

When the Pakistani physicist Abdus Salam founded the International Centre for Theoretical Physics (ICTP) here in Trieste in 1964, I am sure he would have never quite dared to believe that it would go on to be such a success in helping to further the careers of some of the brightest minds from the developing world. Salam’s dream was for the ICTP to be a focal point for talented theorists from countries seeking to build up their research strengths, bringing such people into contact with leading physicists from front-ranking nations to carry out top-quality collaborative projects.

Now, 50 years after it began, the ICTP is hosting a golden-jubilee conference, where it is quite rightly celebrating all that it has achieved – and looking ahead to the future too.

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