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This breakthrough demonstrates a fully autonomous method for generating distributed quantum entanglement using a "quantum bath," eliminating the need for active control and repeated measurements required by previous strategies. By experimentally validating a theory proposed over two decades ago, this approach offers a simpler pathway to connecting distant modules in future large-scale quantum computers and networks. The work represents a significant step toward practical, scalable quantum technologies that rely on passive environmental correlations rather than complex active intervention.

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A “quantum bath” puts quantum entanglement on autopilot

ScienceDailyAugust 31, 20265 min read

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 20 years ago and could offer a simpler way to connect modules in future quantum computers.

Future quantum computers may depend on the ability to connect widely separated modules through distributed entanglement. Until now, creating this kind of connection has generally required active control and repeated measurements. Physicists at the Institute of Science and Technology Austria (ISTA) have now demonstrated a fully autonomous alternative based on a "quantum bath" made from correlated particles of light. Published in Physical Review X, the experiment provides the first demonstration of a prediction proposed more than 20 years ago. The approach could eventually offer a new…

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