Harshna's Hyper-entanglement

Teleporting quantum pictures.

A team of physicists led by Jitai Jing of East China Normal University have achieved quantum teleportation across 100 simultaneous channels, demonstrated by successfully teleporting the quantum information encoded in a 100-pixel image.

They separated the pixels with a hologram generated by a liquid crystal device.

The researchers teleported the capital letter Q. quantum physics uses some words a little differently than what we're used to.

In science fiction and the real world, if you move from here to there by travelling through the space between, despite the fact that something like a mountain is in the way, then we say you've tunnelled.

In quantum physics, the word is used differently.

If you disappear from here and reappear over there without travelling in the space in between, then we say you have quantum tunnelled.

In science fiction, if you disappear from one place and reappear in another without travelling in the space in between, then you would say you have teleported.

In quantum physics, teleportation is where you have two quantum objects like photons of light or electrons or other quanta, and they're connected by quantum entanglement.

This means that no matter how far apart the photons are, for example, if you know that the first photon is polarized vertically, then the other photon must be polarized horizontally.

As soon as you measure one, you instantly know the state of the other one, no matter how far apart they are.

If you get a third photon and use it to measure the quantum properties of Captain James Tiberius Kirk using the first entangled photon, then you can encode 100% of his quantum information precisely onto that third photon.

If you then transmit that photon through space on a train, by fax, or even by radio, then when it reaches the second entangled photon, it can be decoded to reproduce Captain Kirk so well that he will believe that he's disappeared at his origin and reappeared at the destination.

Of course, to you and the rest of the world, it's obvious that the original Captain Kirk was killed by the measurements destroying his body.

and that the third photon encoding his information has taken some time to travel to the destination through space.

That is quantum teleportation.

Since the first experiments in the 1990s, physicists have teleported quantum states using photons, electrons, atoms, and solid state quantum computing qubits across distances of more than 100 kilometers, even from the ground to a satellite.

Entanglement is also used for quantum encryption, which we are relying on to protect our financial transactions and the internet once AI and quantum computers make our current cryptography obsolete.

We need to make a large-scale quantum encrypted communications network to be hacker-resistant.

I say hacker-resistant, although technically such systems are described as hacker-proof.

because the signals are protected by the laws of physics.

If someone tries to listen in, then the signal is scrambled, and you know there's an attack.

However, we all know that hackers can still get to people, where they can't attack the hardware.

It's still best to make the hardware hacker-proof, while being aware that people are the soft danger.

Most quantum teleportation experiments have involved a single channel or a small number of channels.