quantum entanglement tagged posts

Engineers have demonstrated for the first time that it’s possible to connect a network of sensors through quantum entanglement. The experiment opens a door to unprecedented levels of sensitivity in GPS navigation, medical imaging and astronomy.

Your phone’s GPS, the WiFi in your house and communications on aircraft are all powered by radio-frequency waves, or waves, which carry information from a transmitter at one point to a sensor at another. The sensors interpret this information in different ways. For example, a GPS sensor uses the angle at which it receives an RF wave to determine its own relative location. The more precisely it can measure the angle, the more accurately it can determine location.

In a paper pu...

This artist’s impression of one of the most distant, oldest, brightest quasars ever seen is hidden behind dust. The quasar dates back to less than one billion years after the big bang.
Credit: NASA/ESA/G.Bacon, STScI

Results are among the strongest evidence yet for ‘spooky action at a distance’. New research boosts the case for quantum entanglement. Scientists have used distant quasars, one of which emitted its light 7.8 billion years ago and the other 12.2 billion years ago, to determine the measurements to be made on pairs of entangled photons. They found correlations among more than 30,000 pairs of photons – far exceeding the limit for a classically based mechanism.

Take, for instance, two particles sitting on opposite edges of the universe...

Illustration of the quantum entanglement achieved between the two clouds of atoms starting from a single Bose-Einstein condensate. Credit: Iagoba Apellaniz. UPV/EHU

Scientists have achieved, in an experiment, quantum entanglement between 2 Bose-Einstein condensates, spatially separated from each other. Quantum entanglement was discovered by Schrödinger and later studied by Einstein and other scientists in the last century. The groups of entangled particles lose their individuality and behave as a single entity. Any change in one of the particles leads to an immediate response in the other, even if they are spatially separated...

Conceptual picture of the new exotic quantum states that have been generated in Innsbruck. The generation of quantum entanglement in a string of 20 single atoms is shown. Entanglement between neighboring atom pairs (blue), atom triplets (pink), atom quadruplets (red) and quintuplets (yellow) was observed, before the system became too complex to characterize with existing techniques. Credit: IQOQI Innsbruck/Harald Ritsch

Largest entangled quantum register of individually controllable systems to date. A research team is now presenting the largest entangled quantum register of individually controllable systems to date, consisting of a total of 20 quantum bits. The physicists are pushing experimental and theoretical methods to the limits of what is currently possible.

Some of the new quantum t...