By Shannon D. Smith created collaboratively with ChatGPT

When Dorothy was swept up by a swirling tornado and swept away to the magical Land of Oz, she had no idea she was about to embark on a journey that would challenge her understanding of reality. Today, cutting-edge science is embarking on a similar journey — not through tornadoes, but through quantum teleportation.
Northwestern University engineers have achieved what once seemed impossible: they successfully demonstrated quantum teleportation over existing fiber optic cables already carrying internet traffic. (https://opg.optica.org/optica/fulltext.cfm?uri=optica-11-12-1700&id=565936) It is a leap forward that hints at a future where quantum communication transforms how we share information.
Dorothy followed a yellow brick road to find her way home, guided by forces she didn’t fully understand at first. In much the same way, scientists are now navigating a quantum path — a technological road paved with entanglement, teleportation, and photons — to build the networks of tomorrow.
The Yellow Brick Road of Quantum Communication
At the heart of this discovery is quantum entanglement — a phenomenon so strange that even Einstein called it “spooky action at a distance.” When two particles are entangled, their states remain connected, no matter how far apart they are. Change one, and the other instantly changes too.
In the Northwestern experiment, researchers used entanglement to teleport quantum information between particles over 30 kilometers of fiber optic cable, all while traditional internet traffic flowed through the same line.
Think of it like Dorothy’s ruby slippers — something so simple, yet incredibly powerful. The slippers allowed Dorothy to connect to home even while she stood in a foreign world. Quantum entanglement operates much the same way, forming an invisible bridge between particles to enable instant communication — no matter how great the distance.
Not in Kansas Anymore: The Challenge of Quantum Networks
Dorothy’s arrival in Oz wasn’t exactly smooth — she landed in a strange, colorful world filled with challenges. Quantum teleportation faces obstacles, too.
Classical communication — the foundation of today’s internet — uses millions of light particles to transmit data. Quantum communication, on the other hand, relies on single photons that are fragile and easily disrupted. Sending these delicate signals through fiber optic cables crowded with traditional traffic is like navigating a bicycle through a highway full of speeding trucks. (https://thequantuminsider.com/2024/12/27/northwestern-engineers-achieve-quantum-teleportation-over-existing-internet-cable/)
But just as Dorothy found friends to help her along her journey, Northwestern’s team found a solution. By identifying low-interference wavelengths and adding special filters, they protected their quantum signals from being drowned out by classical data.
The result? Quantum teleportation worked, even in the chaotic environment of real-world internet traffic — proof that classical and quantum systems can coexist.
The Wizard Behind the Curtain: How It Works
In Oz, Dorothy eventually discovers the Wizard isn’t as mysterious as he seems—he’s simply using tools and tricks hidden behind the curtain. Quantum teleportation, too, is less about magic and more about engineering precision.
Here’s how it works:
1. Entanglement – Two photons are prepared so that their states are linked.
2. Destructive Measurement – Information is measured and transferred between the particles.
3. Teleportation – The quantum state of one particle appears instantly on the other, even if it’s far away.
It’s not magic — it’s physics. And just like Dorothy learned to use the ruby slippers she had all along, we’re learning to tap into the hidden potential of the quantum world to build networks that are faster, more secure, and fundamentally different from anything we’ve seen before.
Over the Rainbow: What’s Next for Quantum Communication?
Dorothy’s adventure didn’t end when she arrived at the Emerald City. She had to complete her journey and find her way home. Similarly, quantum communication is still in its early stages — but the path forward is becoming clearer.
Northwestern’s success shows that quantum and classical networks can share the same infrastructure, which means we won’t need to tear down our current systems to build quantum highways. Instead, we can upgrade the roads we already have, making the transition to quantum connectivity faster and more affordable.
The next steps?
• Longer Distances: Researchers are already working on expanding quantum networks over greater ranges, pushing the boundaries of entanglement.
• Quantum Security: Quantum communication could create more secure communications, protecting sensitive data in ways that today’s encryption never could.
• Scalability: With quantum signals coexisting alongside classical internet traffic, large-scale adoption of quantum technology could become practical in the near future.
There’s No Place Like Home — And No Network Like Quantum
Dorothy’s journey to Oz wasn’t just about getting back home — it was about discovery, growth, and unlocking the potential she didn’t know she had. In the same way, quantum communication is pushing us to rethink what’s possible.
Northwestern’s experiment shows that the future of communication doesn’t require us to abandon the systems we rely on today. Instead, it invites us to enhance them, combining the classical and the quantum into a seamless network that’s faster, more secure, and ready for the challenges of tomorrow.
Like Dorothy’s slippers, the tools we need may already be within reach — we just have to learn how to use them. And as we step forward into this quantum future, we may find that the journey is just as transformative as the destination.
About the Author:
Shannon D. Smith is an attorney and writer with a passion for exploring the intersections of science, law, and imagination. She enjoys exploring concepts in quantum technology, legal innovation, and the evolving role of AI in our lives.