MIT News breed · Wetenschap

MIT Researchers Develop Room-Temperature Quantum Signal Generation for Secure Communications

MIT researchers have created a scalable platform that generates pairs of highly correlated radio frequency waves at room temperature, overcoming a major hurdle for the deployment of quantum technologies in advanced signal processing and secure communications. This innovation eliminates the need for bulky and expensive cooling equipment typically required for such applications.

The newly developed electronic device, incorporating a magnetic film within a metal cavity, splits an incoming signal into two linked output signals. These correlated signals can be used for noise-resilient communication or high-precision radar and sensing. The researchers demonstrated secure communications by encoding information in one signal, which could only be recovered using its partner signal as a key.

This technique leverages the quantum properties of magnets, specifically magnons (packets of magnetic energy), to create hybrid magnon-photon waves. By coupling a magnetic film with a microwave resonator and controlling energy input, the device outputs synchronized signals with distinct frequencies. While each signal appears random individually, their phase relationship remains strongly correlated, making it difficult for an attacker to decode information without the matching signal.

The team successfully demonstrated the system by encoding a small image into the frequency of one microwave signal and decoding it using its partner. This breakthrough has implications for quantum radar, secure communications, and quantum-limited sensing. It also offers a more scalable and cost-effective approach to quantum simulation, which is used for discovering new drugs and materials, by enabling correlated signal generation at room temperature.

Future work by the researchers includes developing a scalable architecture for the platform and exploring additional applications and the underlying physics of correlated microwave signals. Experts believe this development could be a starting point for quantum-inspired microwave sensing and communication technologies operating in the classical regime at room temperature.

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