Can We Break the Landauer Bound in Spin-Based Electronics?

We found that the minimum energy of reading or erasing a spin datum should be expressed by $\Delta E=2~\mu _{B}B$ , in contrast to ${\Delta E=k}_{B}T\,\,ln(2)$ proposed Landauer 1961. The physics using spin’s orientation represent bit information is fundamentally different from particle’s position classical charge-based data storage: former quantum-dynamic (independent temperature below Curie point), whereas latter thermodynamic (dependent on temperature). Quantitatively, this new bound associated with erasure protocol was estimated as $1.64\times {10}^{-36}J$ 15 orders magnitude lower than ( $3 \times {10}^{-21}J$ ), at no cost angular momentum and increased total entropy. In protocol, there need move electron one side potential well other otherwise used retain defined state still needs greater existing thermal fluctuation (the bound). verified our based number experiments including Rydberg atom spin-spin interaction.