Post Thumb

Long-lived storage of a photonic qubit for worldwide teleportation

Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor Gerhard Rempe at the Max Planck Institute of Quantum Optics (MPQ) have now achieved a major breakthrough: they demonstrated the long-lived storage of a photonic qubit on a single atom trapped in an optical resonator. The coherence time of the stored quantum bit outlasts 100 milliseconds and therefore matches the requirement for the creation of a global quantum network in which qubits are directly teleported between end nodes. “The coherence times that we achieve represent an improvement by two orders of magnitude compared to the current state-of-the-art,” says Professor Rempe. The study is published in Nature Photonics today.

Post Thumb

Ultracold molecules hold promise for quantum computing

A study by MIT researchers shows that collections of ultracold molecules can retain the information stored in them for hundreds of times longer than previously achieved in these materials. These clusters might thus serve as “qubits,” the basic building blocks of quantum computers.

Post Thumb

The psychological importance of wasting time

There will always be an endless list of chores to complete and work to do, and a culture of relentless productivity tells us to get to it right away and feel terribly guilty about any time wasted. But the truth is, a life spent dutifully responding to emails is a dull one indeed. And “wasted”…

Post Thumb

It’s possible that there is a “mirror universe” where time moves backwards, say scientists

Although we experience time in one direction-we all get older, we have records of the past but not the future-there’s nothing in the laws of physics that insists time must move forward. In trying to solve the puzzle of why time moves in a certain direction, many physicists have settled on entropy, the level of molecular…

Post Thumb

It's possible that there is a "mirror universe" where time moves backwards, say scientists

Although we experience time in one direction-we all get older, we have records of the past but not the future-there’s nothing in the laws of physics that insists time must move forward. In trying to solve the puzzle of why time moves in a certain direction, many physicists have settled on entropy, the level of molecular…

Post Thumb

“Gravity Alters the Quantum Nature of Particles on Earth” –What Does It Imply at Cosmological Scales? (Today’s Most Popular)

“It is quite surprising that gravity can play any role in quantum mechanics”, says Igor Pikovski, a theoretical physicist working at the Harvard-Smithsonian Center for Astrophysics:”Gravity is usually studied on astronomical scales, but it seems that it also alters the…

Post Thumb

"Gravity Alters the Quantum Nature of Particles on Earth" –What Does It Imply at Cosmological Scales? (Today's Most Popular)

“It is quite surprising that gravity can play any role in quantum mechanics”, says Igor Pikovski, a theoretical physicist working at the Harvard-Smithsonian Center for Astrophysics:”Gravity is usually studied on astronomical scales, but it seems that it also alters the…

Post Thumb

Australian Physicists Have Proved That Time Travel is Possible

Scientists from the University of Queensland have used photons (single particles of light) to simulate quantum particles travelling through time. The research is cutting edge and the results could be dramatic!

Their research, entitled “Experimental simulation of closed timelike curves “, is published in the latest issue of Nature Communications. The grandfather paradox states that if a time traveler were to go back in time, he could accidentally prevent his grandparents from meeting, and thus prevent his own birth.

However, if he had never been born, he could never have traveled back in time, in the first place. The paradoxes are largely caused by Einstein’s theory of relativity, and the solution to it, the Gödel metric.

Post Thumb

Device can theoretically trap a light ‘bit’ for an infinite amount of time

(Phys.org)-Researchers have designed a nanoscale device that, under ideal conditions, can confine a “bit” of light (that is, light with a single precise energy value) for an infinite amount of time. Although a physically realized device would inevitably lose some of the trapped light due to material imperfections, the researchers expect that it should be possible to completely compensate for this loss by incorporating some form of optical gain like that used in lasers, so that in principle the lifetime can be infinitely large even in a real device.

Post Thumb

Device can theoretically trap a light 'bit' for an infinite amount of time

(Phys.org)-Researchers have designed a nanoscale device that, under ideal conditions, can confine a “bit” of light (that is, light with a single precise energy value) for an infinite amount of time. Although a physically realized device would inevitably lose some of the trapped light due to material imperfections, the researchers expect that it should be possible to completely compensate for this loss by incorporating some form of optical gain like that used in lasers, so that in principle the lifetime can be infinitely large even in a real device.

Post Thumb

"Spookiness" Confirmed by the First Loophole-free Quantum Test

FQXi catalyzes, supports, and disseminates research on questions at the foundations of physics and cosmology, particularly new frontiers and innovative ideas integral to a deep understanding of reality, but unlikely to be supported by conventional funding sources.

Post Thumb

“Spookiness” Confirmed by the First Loophole-free Quantum Test

FQXi catalyzes, supports, and disseminates research on questions at the foundations of physics and cosmology, particularly new frontiers and innovative ideas integral to a deep understanding of reality, but unlikely to be supported by conventional funding sources.

Post Thumb

You Can’t Travel Back in Time, Scientists Say

Dashing the hopes of anyone who wants to be their own grandpa, some theorists now say this darling of science fiction just isn't possible.

Post Thumb

You Can't Travel Back in Time, Scientists Say

Dashing the hopes of anyone who wants to be their own grandpa, some theorists now say this darling of science fiction just isn't possible.

Post Thumb

Where Do Space and Time Come From? New Theory Offers Answers, If Only Physicists Can Figure It Out

At the same time, I’ve been watching how physicists are trying to power through their intimidation, because the theory promises a new way of understanding what space and time really are, at a deep level. The theory was put forward in the late 1980s by Russian physicists Mikhail Vasiliev and the late Efin Fradkin of […]

Post Thumb

Peering into giant planets from in and out of this world

Scientists for the first time have experimentally re-created the conditions that exist deep inside giant planets.

Post Thumb

Physicist suggests some types of wormholes may stay open long enough to send a photon through

University of Cambridge physicist Luke Butcher has uploaded a paper to the arXiv preprint server suggesting that there might exist some type of wormhole that is capable of staying open long enough for a photon to pass through-which of course suggests the possibility of sending messages backwards or forwards in time.