Quantum Physics

Tricking the perfect code machine

They don't often pose for goofy photographs - the members of the Quantum Hacking group at the Norwegian University of Science and Technology (NTNU), and the Centre for Quantum Technologies at the National University of Singapore. But everyone wants their picture taken with Eve.

Teleportation breakthrough made

Scientists have performed successful teleportation on atoms for the first time, the journal Nature reports. The feat was achieved by two teams of researchers working independently on the problem in the US and Austria.

Team's quantum object is biggest by factor of billions

Researchers have created a "quantum state" in the largest object yet. Such states, in which an object is effectively in two places at once, have until now only been accomplished with single particles, atoms and molecules.

Quantum trick for pressure-sensitive mobile devices

Hand-held devices could soon have pressure-sensitive touch-screens and keys, thanks to a UK firm's material that exploits a quantum physics trick. The technology allows, for example, scrolling down a long list or webpage faster as more pressure is applied.

Quantum physics explanation for smell gains traction

The theory that our sense of smell has its basis in quantum physics events is gaining traction, say researchers. The idea remains controversial, but scientists reporting at the American Physical Society meeting in Dallas, US, are slowly unpicking how it could work.

Quantum mechanics rule 'bent' in classic experiment

Researchers have bent one of the most basic rules of quantum mechanics, a counterintuitive branch of physics that deals with atomic-scale interactions. Its "complementarity" rule asserts that it is impossible to observe light behaving as both a wave and a particle, though it is strictly both.

Quantum computing: Is it possible, and should you care?

What is a quantum computer and when can I have one? It makes use of all that "spooky" quantum stuff and vastly increases computing power, right? And they'll be under every desk when scientists finally tame the spooky stuff, right? And computing will undergo a revolution no less profound than the one

Quantum computing device hints at powerful future

One of the most complex efforts toward a quantum computer has been shown off at the American Physical Society meeting in Dallas in the US. It uses the strange "quantum states" of matter to perform calculations in a way that, if scaled up, could vastly outperform conventional computers.

Majorana particle glimpsed in lab

Scientists think they may finally have seen evidence for a famously elusive quarry in particle physics. The Majorana fermion was first predicted 75 years ago - a particle that could be its own anti-particle.

Imaginary time

Imaginary time is a mathematical representation of time which appears in some approaches to special relativity and quantum mechanics. It finds uses in connecting quantum mechanics with statistical mechanics and in certain cosmological theories.

How long is a piece of string?

Alan Davies leaves behind his role in the TV quiz show QI to explore the world of quantum mechanics for the BBC science programme Horizon. The stand-up comic admits to deliberately failing at physics so he wouldn't have to take the O-level.

Higgs boson 'hints' also seen by US lab

The Higgs boson sub-atomic particle is a missing cornerstone in the accepted theory of particle physics. Researchers have been analysing data from the Tevatron machine near Chicago.

Free Will and Quantum Clones: How Your Choices Today Affect the Universe at its Origin

The late philosopher Robert Nozick, talking about the deep question of why there is something rather than nothing, quipped: "Someone who proposes a non-strange answer shows he didn't understand the question.

Antimatter Tevatron mystery gains ground

US particle physicists are inching closer to determining why the Universe exists in its current form, made overwhelmingly of matter. Physics suggests equal amounts of matter and antimatter should have been made in the Big Bang.

Quantum Leap: Information Teleported between Ions at a Distance

Quantum entanglement, whereby two or more objects are linked by an unseen connection, has some famously spooky effects. As quantum researcher Anton Zeilinger has said, entanglement can be thought of as a pair of dice that always land on the same number.

Physics of life: The dawn of quantum biology

The key to practical quantum computing and high-efficiency solar cells may lie in the messy green world outside the physics lab. On the face of it, quantum effects and living organisms seem to occupy utterly different realms.

Bridging the gap to quantum world

Scientists have "entangled" the motions of pairs of atoms for the first time. Entanglement is an effect in quantum mechanics, a relatively new branch of physics that is based more in probability than in classical laws.

Antihydrogen undergoes its first-ever measurement

The antimatter version of the hydrogen atom - antihydrogen - could soon finally give up its secrets. Scientists expect that antihydrogen will have exactly the same properties as hydrogen; but after 80 years, the test is only just becoming possible.

Neutrino 'ghost particle' sized up by astronomers

Scientists have made their most accurate measurement yet of the mass of a mysterious neutrino particle. Neutrinos are sometimes known as "ghost particles" because they interact so weakly with other forms of matter.

Neutrino particle 'flips to all flavours'

An important breakthrough may be imminent in the study of neutrinos. The multinational T2K project in Japan says it has seen indications in its data that these elementary particles can flip to any of their three types.

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