A “quantum bath” puts quantum entanglement on autopilot
Physicists have demonstrated a new way to entangle distant quantum bits without the constant measurements and active control normally required. The team created a “quantum bath,” a shared environment filled with correlated microwave photons that automatically pushes separated qubits into an entangled state and helps keep them there. The experiment confirms a theoretical prediction made more than…
Researchers at the Institute of Science and Technology Austria have developed a method to create distributed entanglement between quantum bits (qubits) without active control or repeated measurements. This breakthrough, published in Physical Review X, provides a fully autonomous alternative to previous approaches. Entanglement is a defining phenomenon in quantum physics, allowing particles to share correlations that cannot be explained by classical physics.
By using a quantum bath made from correlated photons, the researchers demonstrated a way to synchronize distant qubits through a continuous stream of entangled photon states. This method, which stabilizes entanglement and maintains quantum coherence, could offer a new foundation for practical quantum technologies. The researchers used a shared source of correlated light particles to entangle two separated qubits, realizing an idea that had remained theoretical for over two decades.
While their prototype is not yet as efficient as active control methods, the approach could enable the synchronization of multiple qubits and contribute to the development of larger quantum computers and quantum networks.
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