Scientists have successfully teleported information using quantum physics through the same cables that deliver your home internet. A team at Northwestern University demonstrated that fragile quantum data can travel alongside high-speed web traffic without being destroyed. This breakthrough means a future “quantum internet”—which would be virtually unhackable—might run on the fiber optic lines already buried underground, rather than requiring a completely new and expensive network.
Quantum teleportation now works alongside regular internet traffic
For decades, the idea of a quantum internet faced a massive physical barrier. Quantum information relies on single photons (particles of light) that are incredibly delicate. In contrast, the classical internet we use every day sends data as bright pulses containing millions of photons.
Trying to send a single quantum photon through the same cable as regular internet traffic is like riding a bicycle through a tunnel filled with speeding trucks. The “noise” and scattering light from the heavy traffic usually overwhelm and destroy the single rider. Because of this, experts assumed we would need to build an entirely separate infrastructure of special cables just for quantum data.
The Northwestern University team, led by Professor Prem Kumar, proved this assumption wrong. They successfully teleported a quantum state—information held in a particle—over a 30-kilometer (18.6 miles) stretch of fiber optic cable. Crucially, they did this while the cable was simultaneously carrying active, high-speed internet data moving at 400 gigabits per second. This speed rivals even the most advanced home internet connections, showing the system works under real-world loads.
How scientists solved the “bicycle in a highway” problem
The researchers did not invent new cables; they found a smarter way to use the existing ones.
Fiber optic cables carry light at different wavelengths (colors). The team analyzed exactly how the bright “classical” internet signals scatter and create interference inside the glass fibers. They discovered a specific wavelength of light that remained relatively quiet, even when the cable was busy with other data.
By tuning their quantum photons to this “safe” wavelength and developing special filters to block out the noise from the regular traffic, they created a protected lane for the quantum information.
“We carefully studied how light is scattered and placed our photons at a judicial point where that scattering mechanism is minimized,” Professor Kumar explained. This allowed the quantum signal to travel intact from one end of the cable to the other, even while Netflix streams and emails whizzed by in the same fiber.
Why this breakthrough brings the quantum internet closer
This achievement removes the biggest financial hurdle to a quantum internet. If quantum networks required digging up streets to lay new cables worldwide, the cost would be prohibitive. This study shows that the existing global web of fiber optics can likely do the job.
A quantum internet would not just be faster; it would be fundamentally different.
- Perfect Security: It uses quantum entanglement, a state where two particles stay linked no matter the distance. Attempting to intercept the message destroys it, making eavesdropping impossible.
- Distributed Computing: It could link small quantum computers together to form a massive supercomputer capable of solving problems—like drug discovery or material science—that are impossible today. This is a key step toward fault-tolerant quantum computing, which requires stable connections between processors.
Prof. Jim Al-Khalili, a theoretical physicist not involved in the study, called it a “huge breakthrough,” noting that it opens the door for quantum cryptography and sensing to move out of the lab and into the real world.
What you can do about it
You cannot buy a quantum internet connection yet, but this research brings the timeline forward.
- Follow the progress: The UN designated 2025 as the International Year of Quantum Technology. Watch for more announcements as teams test this tech in real-world underground cables rather than lab spools.
- Understand the shift: Security is the first big application. Industries like banking and government will likely adopt this first to protect data.
- Stay skeptical of hype: “Teleportation” here refers to data, not people. We are moving information instantly, not physical objects. However, these experiments may eventually help us understand the nature of quantum reality itself.
Sources & related information
Optica – Quantum teleportation coexisting with classical communications – 2024
The official peer-reviewed paper detailing the experiment, published in the journal Optica. It explains the specific wavelengths and filtering techniques used to shield the quantum state.
Northwestern University – First demonstration of quantum teleportation over busy Internet – 2024
The press announcement from the university describing Prof. Prem Kumar’s work and its implications for future infrastructure.
BBC Science Focus – ‘Nobody thought it was possible’: Quantum teleportation is here – 2024
A report interviewing the researchers and outside experts on why this specific method changes the roadmap for quantum technology.
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