Groundbreaking discovery in the scientific world: Quantum teleportation over internet cables

A revolutionary step has been taken in communication; scientists have succeeded in achieving quantum teleportation, previously considered impossible, via internet cables. Engineers at Northwestern University have made history as the first team to successfully perform quantum teleportation over a fiber-optic cable that is already carrying internet traffic.

This discovery demonstrates that a practical way to transmit information instantly over any distance has been found. The fact that quantum teleportation is possible with existing internet infrastructure suggests that a highly fast and innovative type of communication could enter our lives in the near future.

Teleportation is often featured in science fiction works as the ability of humans to travel at the speed of light. However, the usability of this technology for living beings or human-sized objects has not yet been proven.

QUANTUM ENTANGLEMENT

Quantum teleportation is based on a phenomenon called quantum entanglement. This phenomenon occurs when the quantum states of two or more particles become linked. When the state of one particle is measured, the state of the other particle is determined instantly, regardless of distance. This state is called "entanglement."

To better understand this concept, one can look at a thought experiment often used: In this imaginary experiment, there are two gloves in a box, one red and one blue, and they are sent to different places. If you open one box and find the red glove, you can immediately understand that the glove in the other box is blue.

The difference in quantum entanglement is this: The gloves have not chosen a color until the boxes are opened. Both are in a state of superposition, carrying the probabilities of being both red and blue. As soon as you open a box and see the color of one glove, the color of the glove in the other box is also determined.

In quantum entanglement, no matter how far apart two particles are, they are connected to each other. This means they can exchange information without having to traverse the physical distance between them.

'LIKE A BICYCLE ON A BUSY HIGHWAY'

While classical communication methods consist of millions of light particles, only a pair of photons (light particles) are used in quantum communication. Previously, researchers thought that these individual photons could not pass through the 'busy highway' used in classical communication.

A pair of photons was likened to a bicycle trying to navigate around massive trucks along this busy road.

However, researchers from Northwestern University discovered a way to allow these delicate photons to avoid the heavy traffic. Studying how light propagates within fiber-optic cables, the team succeeded in placing the photons into a less dense light wavelength.

This wavelength receives less interference from other signals and facilitates the passage of the photons. After placing the photons into this wavelength, the team also added special filters to reduce noise caused by regular internet traffic.

'NO ONE THOUGHT IT WAS POSSIBLE'

Prem Kumar and his team at Northwestern University set up a 30-kilometer-long fiber-optic cable with an entangled photon at each end to test the new method they found. They then succeeded in transmitting quantum information and traditional internet traffic over this cable simultaneously.

As the team applied the teleportation protocol, they attempted to determine the quality of the quantum information at the receiving end through quantum measurements made at the midpoint of the cable. As a result, it was determined that the quantum information was successfully transmitted even while heavy internet traffic was passing through.

Kumar stated that he plans to repeat these experiments over longer distances.

The scientist said, "This is really exciting because it was not thought to be possible before."

"Our work provides a new roadmap for the future of quantum communication by allowing quantum and classical networks to share a combined fiber-optic infrastructure. This is an important step toward taking quantum communication to the next level," he added.