Bouncing laser beams could bring quantum strangeness to the everyday world.
The quantum world of atoms and subatomic particles is full of intuition-defying phenomena such as objects existing in two different states at once. We dont normally have to worry about such weirdness impinging on our everyday macroscopic world. But Italian physicists have worked out how to invest something we can see and touch with quantum strangeness.
Stefano Mancini, of the University of Milan, and colleagues plan to entangle two mirrors1. The fates of entangled objects are intimately entwined by the rules of quantum mechanics. If the plan works, one mirror will not exist in one state without the other being in another well-defined state.
Next stop teleportation?
Physicists hope to use entangled states of quantum particles, such as photons, to process information in new ways. By encoding information into the different states of atoms and photons, they are devising secure encryption methods for data transmission, to teleport quantum states from one place to another, and to produce new, ultrafast computers.
But no matter what the writers of Star Trek would have us believe, effects such as teleportation are not generally possible at the macroscopic scale, because entanglements of more than a handful of particles are extremely fragile.
Interactions between the particles and their environment typically disrupt their delicate interdependencies. The disruption is more pronounced the warmer the system gets. Even temperatures of just a degree or so above absolute zero are usually sufficient to blur out entanglements in systems that contain many particles.
PHILIP BALL | © Nature News Service
New quantum liquid crystals may play role in future of computers
21.04.2017 | California Institute of Technology
Light rays from a supernova bent by the curvature of space-time around a galaxy
21.04.2017 | Stockholm University
The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
Two researchers at Heidelberg University have developed a model system that enables a better understanding of the processes in a quantum-physical experiment...
Glaciers might seem rather inhospitable environments. However, they are home to a diverse and vibrant microbial community. It’s becoming increasingly clear that they play a bigger role in the carbon cycle than previously thought.
A new study, now published in the journal Nature Geoscience, shows how microbial communities in melting glaciers contribute to the Earth’s carbon cycle, a...
20.04.2017 | Event News
18.04.2017 | Event News
03.04.2017 | Event News
21.04.2017 | Physics and Astronomy
21.04.2017 | Health and Medicine
21.04.2017 | Physics and Astronomy