Hebrew University physicists simulate superconducting memory bit near physics limit
Physicists at the Hebrew University of Jerusalem published research in Nature Communications on September 24 regarding a simulated superconducting memory bit.
Simulation estimates energy efficiency
The researchers estimate that a single superconducting vortex can flip a bit at about five times Landauer's limit. This figure is based on continuous-drive measurements rather than a direct measurement of erasure. The simulation anchors the claim to specific physical constraints observed in the experiment.
Operating temperature requirements
The device functions only at 4.2 kelvin, which requires significant refrigeration costs to maintain. At this temperature, the claimed million-fold energy edge over conventional chips shrinks considerably. Liquid helium is necessary to keep the system within the required thermal range.
Publication and release dates
The study appeared in Nature Communications on September 24 before a university press release followed on October 11. The work describes a nanoscale whirlpool of electrical current acting as a memory bit. Physicists note that real chips currently cannot approach this theoretical energy floor.
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