This site uses cookies. By continuing to use this site you agree to our use of cookies. To find out more, see our Privacy and Cookies policy.
Skip to the content

Free weekly newswire

Sign up to receive all our latest news direct to your inbox.

Physics on film

100 Second Science Your scientific questions answered simply by specialists in less than 100 seconds.

Watch now

Bright Recruits

At all stages of your career – whether you're an undergraduate, graduate, researcher or industry professional – brightrecruits.com can help find the job for you.

Find your perfect job

Physics connect

Are you looking for a supplier? Physics Connect lists thousands of scientific companies, businesses, non-profit organizations, institutions and experts worldwide.

Start your search today

Tag archives: quantum computers

Physics World 2016 Focus on Optics and Photonics is out now

PWOPT16-cover-200By Matin Durrani

Research into optics, photonics and lasers is not only fascinating from a fundamental point of view. It’s also vital for technology, industry and applications in everyday life.

In the latest focus issue of Physics World, which is out now in print, online and through the Physics World app, you can find out about some of the latest research into optics and photonics – and how it’s being put to good use.

In our cover feature, take a look at some of the latest advances in invisibility cloaking – 10 years after first being demonstrated at microwave frequencies.

(more…)

Posted in General | Tagged , , , , , , , | Comments Off on Physics World 2016 Focus on Optics and Photonics is out now | Permalink
View all posts by this author  | View this author's profile

Looking toward the quantum-technology landscape of the future

Looking to the future: Sir peter Knight opening the Quantum technology for the 21st Century conference at the RSC (Courtesy: Tushna Commissariat)

Futuristic views: Peter Knight opening the conference at the Royal Society in London. (Courtesy: Tushna Commissariat)

By Tushna Commissariat

Not a week goes by here at Physics World that we don’t cover some advance in quantum mechanics – be it another step towards quantum computing or error correction, or a new type of quantum sensor, or another basic principle being verified and tested at new scales. While each advance may not always be a breakthrough, it is fair to say that the field has grown by leaps and bound in the last 20 years or so. Indeed, it has seen at least two “revolutions” since it first began and is now poised on the brink of a third, as scientific groups and companies around  the world race to build the first quantum computer.

With this in mind, some of the stalwarts of the field – including Peter Knight, Ian Walmsley, Gerard Milburn, Stephen Till and Jonathan Pritchard – organized a two-day discussion meeting at the Royal Society in London, titled “Quantum technology for the 21st century“, which I decided to attend. The meeting’s main aim was to bring together academic and industry leaders “in quantum physics and engineering to identify the next generation of quantum technologies for translational development”. As Knight said during his opening speech, the time has come to “balance the massive leaps that the science has made with actual practical technology”.

(more…)

Posted in General | Tagged , , , | Comments Off on Looking toward the quantum-technology landscape of the future | Permalink
View all posts by this author  | View this author's profile

IBM wants you to use its quantum computer

 

By Hamish Johnston

Starting today, members of the public will be able to run programs on IBM’s quantum processor. Users can access the device – which comprises five superconducting quantum bits (qubits) – via the US-based company’s “IBM Quantum Experience” website.

Described as a “cloud-enabled quantum computing platform”, IBM says that users will be able to run algorithms and experiments on IBM’s quantum processor, manipulate individual qubits, as well as access quantum-computing tutorials and simulations.

(more…)

Posted in General | Tagged , | 1 Comment | Permalink
View all posts by this author  | View this author's profile

How to make money by quantum computing

Quantum temple: will the congregation at Bristol's Wills Memorial Building convert to quantum annealing?

Quantum temple: will the congregation at Bristol’s Wills Memorial Building convert to quantum annealing?

By Hamish Johnston at the BQIT:16 conference in Bristol

Today I have made the short trip from the office to the University of Bristol, which is hosting the BQIT:16 conference on quantum information. I had been looking forward to the “Industry Perspective” session, which was headlined by Steve Adachi of the US defence supplier Lockheed Martin. Several years ago the firm was the first commercial buyer of what some consider to be the world’s first commercial quantum computer – a device made by Canada’s D-Wave Systems – and I wanted to know what Lockheed Martin was doing with it.

To say that D-Wave and its products are controversial is an understatement. Indeed, I wouldn’t be surprised if some delegates to this conference are brought to fisticuffs over D-Wave’s quantum annealing protocols later this evening in Bristol’s cider pubs.

(more…)

Posted in General | Tagged , | 2 Comments | Permalink
View all posts by this author  | View this author's profile

The April 2016 issue of Physics World is now live

PWApr16cover-200By Matin Durrani

The April 2016 issue of Physics World magazine is ready and waiting for you to access via our app for mobile and desktop.

Our cover story this month is about Rydberg atoms – those super-sized atoms that are one of the hot topics in condensed-matter physics – and in particular how they could be used to create quantum computers.

You can also find out how virtual-reality tools could help you to learn about the science of optics and learn more about a new research centre at the National Autonomous University of Mexico that’s bringing a fresh approach to the science of complexity.

If you’re a member of the Institute of Physics (IOP), you can now enjoy immediate access to the new issue with the digital edition of the magazine in your web browser or on any iOS or Android mobile device (just download the Physics World app from the App Store or Google Play). If you’re not yet in the IOP, you can join as an IOPimember for just £15, €20 or $25 a year to get full access to Physics World digital.

(more…)

Posted in General | Tagged , , , , , , | 2 Comments | Permalink
View all posts by this author  | View this author's profile

Getting a fix on quantum computations

Nine superconducting qubit

Bit of choice: A photograph of the nine superconducting qubit device developed by the Martinis group at the University of California, Santa Barbara, where, for the first time, the qubits are able to detect and effectively protect each other from bit errors. (Courtesy: Julian Kelly/Martinis group)

By Tushna Commissariat in New York City, US

Although the APS March meeting finished last Friday and I am now in New York visiting a few more labs and physicists in the city (more on that later), I am still playing catch-up, thanks to the vast number of interesting talks at the conference. One of the most interesting sessions of last week, and a pretty popular one at that, was based on “20 years of quantum error correction” and I went along to the opening talk by physicist John Preskill of the California Institute of Technology. I had the chance to catch up with Preskill after his talk and we discussed just why he thinks that we are not too far away from a true quantum revolution.

Just in case you haven’t come across the subject already, quantum error correction is the science of protecting quantum information (or qubits) from errors that would occur as the information is influenced by the environment and other sorts of quantum noise, causing it to “decohere” and lose its quantum state. Although it may seem premature that scientists have been working on this problem for nearly two decades when an actual quantum computer has yet to be built, we know that we must account for such errors if our quantum computers are ever to succeed. It will be essential if we want to achieve fault-tolerant quantum computation that can deal with all sorts of noise within the system, as well as faults in the hardware (such as a faulty gate) or even a measurement.

Over the past 20 years, theoretical work in the field has made scientists confident that quantum computing of the future will be scalable. Preskill says that “it’s exciting because the experimentalists are taking it quite seriously now”, while initially the interest was mainly theoretical. Previously, scientists would artificially create the noise in the quantum systems that they would correct but now actual quantum computations can be fixed. Indeed, Preskill says that one of the key things that has really moved quantum error correction along in the past few years is the concentrated improvement of the hardware used, i.e. better gates with multiple qubits being processed simultaneously.

(more…)

Posted in APS March Meeting 2016 | Tagged , , , | 3 Comments | Permalink
View all posts by this author  | View this author's profile

Commercial quantum computer works, sort of

Is it or isn't it? The D-Wave 2X quantum processor (Courtesy: D-Wave Systems)

Is it or isn’t it? The D-Wave 2X quantum processor. (Courtesy: D-Wave Systems)

By Hamish Johnston

This morning I was speaking to quantum-entanglement expert Jian-Wei Pan, who shares the Physics World Breakthrough of the Year 2015 award for his work on quantum teleportation. Pan briefly mentioned research reported earlier this week by John Martinis, Hartmut Neven and colleagues at Google Research whereby a D-Wave 2X quantum computer was used to perform a computational task 100 million times faster than a classical algorithm.

This is a remarkable result, but does it mean that D-Wave’s controversial processors actually work as quantum computers? Some quantum-computing experts are urging caution in how the research is interpreted.

(more…)

Posted in General | Tagged , | 3 Comments | Permalink
View all posts by this author  | View this author's profile

A guided tour inside D-Wave’s iconic black box

By Hamish Johnston

Has D-Wave Systems built the world’s first commercial quantum computer? The Canada-based company says it has but some physicists in the quantum-information community beg to differ. Putting aside heady questions like “Does it work?”, I think everyone agrees that the Tardis-sized black boxes that house D-Wave’s processors look great. But what exactly is inside?

(more…)

Posted in General | Tagged , | 1 Comment | Permalink
View all posts by this author  | View this author's profile

Once upon a time…the art of telling a good quantum tale

 

By Tushna Commissariat

It’s been nearly two weeks since I spent three intense and interesting days in Sweden bundled into a classroom with other journalists and scientists to polish up our knowledge of all things quantum. Since attending the NORDITA science-writing workshop, I have spent a lot of time thinking about one of the main themes of the meeting: “What is the best way to communicate quantum physics to the public?”

(more…)

Posted in NORDITA science-writing workshop | Tagged , , | 2 Comments | Permalink
View all posts by this author  | View this author's profile

Fine-tuning quantum features to develop future technologies

Two superconducting qubits (left) and an artificial diamond with an NV centre

Quantum kit: two superconducting qubits (left) and an artificial diamond with an NV centre (right). (Courtesy: Tushna Commissariat)

By Tushna Commissariat

I’ve left sunny Stockholm and I’m back at the office in blustery Bristol, but I still have a few good quantum tales to tell from the science-writers’ workshop at NORDITA last week. On Thursday, the main speaker of the day was Raymond Laflamme, who is the current director of the Institute for Quantum Computing at the University of Waterloo in Canada. Laflamme – who kick-started his career working on cosmology at the University of Cambridge in the UK as a student of Stephen Hawking – studies quantum decoherence and how to protect quantum systems from it by applying quantum error-correction codes, as well as using nuclear magnetic resonance (NMR) to develop a scalable method of controlling quantum systems.

(more…)

Posted in NORDITA science-writing workshop | Tagged , , | Comments Off on Fine-tuning quantum features to develop future technologies | Permalink
View all posts by this author  | View this author's profile