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

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