Program the structure of light like tuning an instrument
At the University of Ottawa, physicists have found a way to make light impersonate matter — bending laser beams through programmable optical screens until photons trace the same paths electrons would inside exotic crystals and superconductors. The achievement belongs to a long human effort to understand the hidden architecture of the quantum world, and this time the instrument is compact enough to sit on a tabletop, flexible enough to run over three hundred distinct simulations, and transparent enough to let researchers simply watch. Where quantum dynamics once hid inside the depths of solid materials, they now unfold on a camera.
- Understanding how electrons behave inside exotic quantum materials has long required enormous, expensive infrastructure — or accepting that the most interesting dynamics simply cannot be observed directly.
- A collaboration between Ottawa's Nexus for Quantum Technologies Institute and Federico II University in Italy has built a photonic simulator that replaces physical hardware with software commands, reshaping laser light through three programmable screens to mimic any target material on demand.
- The platform successfully reproduced the protective signatures of topological materials and simulated particle motion across geometries — cylinders, toruses, closed loops — that encode real quantum physics rarely achieved in purely optical experiments.
- Because the physics lives in light rather than buried inside solid-state devices, every stage of quantum evolution can be photographed in real time, offering a clarity of observation that was previously unavailable.
- The results, published across two 2026 papers, point toward a future where compact tabletop setups accelerate quantum transport research and prototype the building blocks of next-generation quantum technologies.
In a lab at the University of Ottawa, three programmable optical screens sit in the path of a laser beam, quietly reshaping how light moves through space. By issuing a software command — no rewiring, no new hardware — researchers can make photons behave exactly as electrons would inside a crystal, a superconductor, or any other exotic material a physicist wants to study. The platform, developed in collaboration with Federico II University in Italy, can run more than 300 distinct quantum processes on a setup compact enough to fit on a tabletop.
Physics professor Ebrahim Karimi describes the method as programming the structure of light the way a musician tunes an instrument. Each adjustment to the three spatial light modulators creates a different virtual material for photons to stream through. Switch the configuration, and an entirely different material emerges — all without touching the optics themselves.
The team validated the concept using both classical laser light and individual photons. Among their results, they reproduced the signatures of topological materials — exotic phases of matter whose internal geometry shields electrons from disturbances that would normally scatter them. These materials are central to next-generation electronics, yet observing their effects directly has always been notoriously difficult. Senior research associate Alessio D'Errico notes that the optical platform lets researchers watch those effects unfold in real time, directly on a camera.
Equally striking is the platform's geometric reach. The same physical setup can simulate particle motion on cylinders, toruses, and closed loops — shapes that encode genuine quantum physics but have rarely been reproduced in photonic experiments. Because the information lives in light rather than buried inside solid-state devices, every stage of quantum evolution can be photographed, offering a transparency that changes what becomes possible. The work, published in two 2026 papers, opens a path toward using compact photonic platforms to study quantum transport and prototype the building blocks of future quantum technologies — all controlled by software, all observable in real time.
In a lab at the University of Ottawa, researchers have built something that works like a tuning fork for light itself. Three programmable optical screens sit in the path of a laser beam, reshaping how the light moves and twists through space. By adjusting these screens—a task that takes only a software command—the team can make photons behave exactly as electrons would inside a crystal, a superconductor, or any other exotic material a physicist wants to understand. No rewiring. No new hardware. Just light, bent to order.
The collaboration between Ottawa's Nexus for Quantum Technologies Institute and researchers at Federico II University in Italy has produced something genuinely useful: a quantum simulator that works in free space, compact enough to fit on a tabletop, and flexible enough to run more than 300 distinct quantum processes without breaking a sweat. The results appear in two papers published in 2026—one in Light: Science & Applications, the other in Advanced Photonics—and they suggest a new way forward for studying the quantum world.
Ebrahim Karimi, a full professor in Ottawa's physics department, describes the approach with an apt metaphor: "We program the structure of light the way a musician tunes an instrument." Each adjustment to those three spatial light modulators creates a different virtual material. Photons stream through, following paths that mirror how electrons would move through the real thing. Switch the configuration, and you've got a completely different material to study—all without touching the optics themselves.
The team tested their platform with both classical laser light and individual photons, and the results validated the concept across the board. In one set of experiments, they reproduced the signatures of topological materials—exotic phases of matter whose internal geometry acts like a shield, protecting electrons from disturbances that would normally scatter them. These materials are central to the next generation of electronics, but observing their effects directly has always been notoriously difficult. "Our optical platform lets us watch those effects unfold in real time, right on a camera," says Alessio D'Errico, a senior research associate on Karimi's team.
What makes this approach particularly powerful is its reach beyond simple grids. By reprogramming the light patterns, the same physical setup can simulate particle motion on closed loops, cylinders, and torus-shaped surfaces—geometries that encode real physics found in advanced quantum materials but have rarely been reproduced in purely photonic experiments. "A torus or a cylinder might sound abstract, but these shapes encode real physics," D'Errico explains. "Being able to explore them all on a single, reconfigurable tabletop setup is a genuine step forward for quantum simulation."
Because the information lives in light rather than in the depths of solid-state devices, every stage of quantum evolution can be photographed directly. Researchers get an unusually clear view of dynamics that are typically hidden, buried inside materials where they resist direct observation. This transparency changes what becomes possible. Complex dynamics can be designed, watched, and understood with a clarity that wasn't available before. The work opens a path toward using compact photonic platforms to study quantum transport, probe topological phenomena, and prototype building blocks for future quantum technologies—all on equipment that fits in a room, all controlled by software, all observable in real time.
Citações Notáveis
We program the structure of light the way a musician tunes an instrument. Each configuration lets photons walk through a different virtual material, and we can switch between hundreds of them without touching the optics.— Ebrahim Karimi, University of Ottawa
Our optical platform lets us watch those effects unfold in real time, right on a camera.— Alessio D'Errico, senior research associate
A Conversa do Hearth Outra perspectiva sobre a história
Why does it matter that you can do this with light instead of electrons in a crystal?
Because you can actually see what's happening. With electrons trapped in solid material, the quantum behavior is hidden. With photons, you photograph each step. You watch the evolution unfold.
But couldn't you just build more electronic circuits if you wanted to study more materials?
You could, but each new material means new hardware, new wiring, new everything. Here, a software update does it. Three screens reshape the light. That's the whole experiment reconfigured.
What's the practical payoff? Why should anyone outside physics care?
Topological materials could revolutionize electronics—make devices faster, more efficient, more robust. But we can't design them well if we can't see how they work. This lets us see, quickly, on a tabletop.
You mentioned running 300 different quantum processes. What does that actually mean?
It means 300 different virtual materials, 300 different geometries and configurations, all tested on the same piece of equipment. That's the flexibility. That's what makes it powerful.
Is this a replacement for real quantum computers?
No. It's a simulator. It shows you how quantum matter behaves, helps you understand the physics. A quantum computer solves problems. These are different tools for different jobs.
What comes next?
Scaling it up. Making it even more compact. Using it to design real materials and devices. This is the foundation—the proof that photonic platforms can do serious quantum science.