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Physicists have demonstrated that energy leakage in superconducting qubits can sustain quantum entanglement rather than destroying it, effectively bypassing the need for vulnerable particle transport. By utilizing synthetic squeezing, this steady-state approach offers a promising pathway to overcoming decoherence and building more robust long-distance quantum communication networks. This breakthrough addresses a fundamental obstacle in scaling up practical quantum infrastructure by turning a traditional detriment into an asset.

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Entanglement spreads further thanks to energy leakage, study finds

Quantum ZeitgeistAugust 11, 20265 min read

Physicists at Illinois & Chicago showed energy leakage can generate quantum entanglement, potentially allowing it to extend over larger separations.

A pair of superconducting qubits at the University of Illinois Urbana-Champaign and the University of Chicago have demonstrated that energy leakage, traditionally considered detrimental, can generate sustained quantum entanglement. Researchers realized this phenomenon, predicted by theory and recently published, using a new technique called synthetic squeezing. “In the past, generating entanglement meant performing operations on different parts of a system and then transporting them away from each other,” said Wolfgang Pfaff, Illinois Grainger Engineering assistant professor at the University of Illinois Urbana-Champaign. This new method bypasses that vulnerable transport stage, potentially offering a more reliable path to long-distance quantum communication.…

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