'Remarkably close to the minimum permitted by physics': this superconducting memory bit runs at an estimated 5x the limit, but at -269°C the fridge shrinks its claimed million-fold edge over today’s chips considerably

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Hebrew University physicists estimate a single superconducting vortex can act as a memory bit at about five times Landauer's limit, at 4.2 kelvin

The fivefold figure is a simulation-based estimate anchored to continuous-drive measurements, not a measured erasure, however

The release's million-fold edge over conventional computers disregards refrigeration costs

Every time a computer erases a bit, it pays an energy toll that physics will not waive; IBM physicist Rolf Landauer pinned down the minimum in 1961: kT…