Crypto news

A group of researchers from the Faculty of Physics at Vilnius University has presented a theoretical model that could radically change the approach to managing quantum systems. The development is based on using light to pre-"program" atoms — all without the need for bulky external magnetic fields, which were traditionally considered an essential component of such experiments.

The essence of the concept is simple yet elegant: a light beam first sets the atoms into a specific state, and then this pre-prepared atomic medium begins to actively influence the shape and polarization of complex laser pulses. The key element of the model is optical vortices. These are beams with a spiral wavefront structure, where the intensity at the center drops to nearly zero. The size of the dark region is determined by the so-called topological charge, which, as the authors emphasize, "is not limited and can take any positive or negative integer values."

In practice, this opens access to a vast number of states — up to 10,000 different configurations. Instead of the familiar qubits, which operate with only two states, the scientists propose using qudits — multidimensional units of quantum information capable of carrying significantly more data.

To control vector vortices, the researchers modeled the interaction of a beam with an atomic gas, where the atoms have three energy levels. In this model, the prepared medium literally "inherits" the spatial pattern of light: in some zones, atoms actively absorb radiation, while in others they become almost transparent. A feedback loop emerges — the atomic response begins to reshape the beam itself, transforming a simple ring structure into a complex petal-like pattern with several bright regions around the center. At the same time, the polarization structure of the radiation also changes.

Previously, achieving such control required powerful external magnetic fields and expensive equipment. The new model promises to eliminate these limitations, theoretically paving the way for the creation of faster quantum processors, highly secure quantum communication networks, and ultra-precise optical sensors.

My expert assessment: This is a case where fundamental physics meets the practical needs of the industry. The elimination of magnetic fields is not just a technical simplification but a strategic breakthrough. If the model is confirmed experimentally, we could see a new class of quantum devices where information management becomes orders of magnitude more flexible and compact. For investors and developers, this is a signal: keep an eye on work with structured light — it could become the next "mainstream" in quantum computing.