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Columbia researchers have successfully extended the lifetime of ultracold NaCs molecules to over six seconds by using microwave shields to suppress destructive collisions. This breakthrough enables the precise manipulation of strong dipolar interactions required for complex quantum simulations, overcoming a major barrier in maintaining fragile quantum states. The technique represents a significant step forward in controlling many-body systems essential for future quantum computing and simulation architectures.

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Columbia physicists use quantum microwaves to shield molecules from loss

Quantum ZeitgeistSeptember 19, 20264 min read

Columbia physicist Sebastian Will and his lab stabilized ultracold NaCs molecules against loss, a key step for quantum simulation.

Columbia University physicist Sebastian Will and his lab have achieved a high level of stability in ultracold sodium-cesium (NaCs) molecules, suppressing loss processes to below the detection limit even while maintaining strong dipolar interactions. These NaCs molecules, possessing a slight positive charge at one end and negative at the other, offer unique potential for quantum simulation due to their long-range interactions, a feature previously hampered by rapid molecular decay. The team’s technique, detailed in Science, utilizes protective microwave shields…

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