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Landauer’s analysis located a thermodynamic cost in logically irreversible operations. Resetting a one-bit memory from two equiprobable logical states to one standard state reduces its logical entropy. In an ideal isothermal implementation, the minimum heat dissipated to the environment is . per erased bit [ 9 ] . This is a lower bound on an idealized erasure, not a claim that every transistor switch dissipates exactly T2 , nor that computation in general has one universal energy per operation.
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Symbol k_mathrm B
athrm B is an input to the expression that computes the quantity on the left.
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Equation 23 · Physics
The Statistical Mechanics of Irreversibility at Molecular Scale
This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.
Landauer’s analysis located a thermodynamic cost in logically irreversible operations. Resetting a one-bit memory from two equiprobable logical states to one standard state reduces its logical entropy. In an ideal isothermal implementation, the minimum heat dissipated to the environment is . per erased bit [ 9 ] . This is a lower bound on an idealized erasure, not a claim that every transistor switch dissipates exactly T2 , nor that computation in general has one universal energy per operation.