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The Surprising Cause of Qubit Decay in Quantum Computers
- westurner 2y ago> The transmission of supercurrents is made possible by the Josephson effect, where two closely spaced superconducting materials can support a current with no applied voltage. As a result of the study, previously unattributed energy loss can be traced to thermal radiation originating at the qubits and propagating down the leads. > Think of a campfire warming someone at the beach – the ambient air stays cold, but the person still feels the warmth radiating from the fire. Karimi says this same type of radiation leads to dissipation in the qubit. > This loss has been noted before by physicists who have conducted experiments on large arrays of hundreds of Josephson junctions placed in circuit. Like a game of telephone, one of these junctions would seem to destabilize the rest further down the line. ScholarlyArticle: "Bolometric detection of Josephson radiation" (2024) https://www.nature.com/articles/s41565-024-01770-7 https://www.nature.com/articles/s41565-024-01770-7
- westurner 2y ago"Computer Scientists Prove That Heat Destroys Quantum Entanglement" (2024) https://news.ycombinator.com/item?id=41381849 https://news.ycombinator.com/item?id=41381849