August 11th, 2024

Success in teleporting light and solidifying it: Faster than the speed of light

Researchers at ICFO in Barcelona achieved quantum teleportation of light, enabling quantum state transfer over 1 kilometer using existing telecommunications, paving the way for secure quantum communication networks and a potential quantum internet.

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Success in teleporting light and solidifying it: Faster than the speed of light

Researchers at the Institute of Photonic Sciences (ICFO) in Barcelona have successfully achieved quantum teleportation of light, marking a significant advancement in the field of quantum physics. This breakthrough allows for the transfer of quantum states, specifically photons carrying information, over distances without the need for physical transmission through space. The process relies on quantum entanglement, where two particles become interconnected, allowing changes in one to instantaneously affect the other, regardless of distance. In the ICFO experiment, entangled photons were utilized to transmit quantum information over a distance of 1 kilometer, demonstrating the potential for long-distance quantum communication. The researchers employed existing telecommunications infrastructure, ensuring compatibility with current fiber-optic systems, which facilitates the transition from classical to quantum communication without requiring new equipment. This development paves the way for future quantum networks, enhancing secure communication capabilities and redefining information transfer. While the notion of traveling faster than light is metaphorical, the implications of this research could lead to a quantum internet, revolutionizing how information is shared and processed.

- ICFO researchers achieved quantum teleportation of light, enabling the transfer of quantum states.

- The process utilizes quantum entanglement, allowing instantaneous information transfer between entangled particles.

- The experiment successfully transmitted quantum information over 1 kilometer using existing telecommunications infrastructure.

- This breakthrough could lead to the development of secure quantum communication networks.

- The research signifies a potential shift towards a quantum internet, transforming information communication technologies.

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By @ryankrage77 - 6 months
I can't wrap my head around how you confirm the results, when any measurements are still limited by C. Even if you've got two atomic clocks in sync at each end of the experiment, surely you can only verify they are in sync as accurately as the latency between them? (e.g, if two clocks are 100 light-nanoseconds apart, you can only confirm they match to within 100 nanoseconds?).

edit: If I'm understanding this article correctly, https://www.icfo.eu/news/2177/long-distance-quantum-teleport..., they are still limited by 'classical hardware', and the measurement of the entangled particle takes time. So this doesn't yet allow transferring information faster than C?

By @sinuhe69 - 6 months
In sci-fi, a scene is well known: the departing spaceship keeps on board a collections of entangled particles with its peers on earth. Communications underway are realized through encoding and decoding the states of the entangled particles. This way they can communicate with command in real-time even over a vast distance, where the ship needed many years or even decades to go. It’s especially useful in battle scenarios.
By @renox - 6 months
BS you can't use teleportation to transfer information faster than the speed of light. Maybe they can use 'quantum teleportation' to do something useful but this article doesn't explain what..