Symbol k_mathrm B
athrm B is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
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None of this derives Darwin from physics, and it does not need to. Natural selection is a logically separate claim — that heritable variation plus differential reproduction produces adaptation — that would remain true in a hypothetical universe with a different thermodynamic arrow, or none at all, provided that universe still somehow supported heredity. What the physics in this article supplies is the reason no such universe was ever going to get the chance: without a low-entropy past there is no preferred direction for anything to accumulate in; without decoherence and Landauer’s bound there is no such thing as a record that stays written; without fluctuation theorems there is no exact…
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Symbol T
T is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
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Published contexts (3)
A symbol can carry a different meaning in another article. Each occurrence keeps its own guide and term definitions.
Equation 20 · Evolutionary Physics
The Arrow of Time and the Engine of Evolution
This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.
None of this derives Darwin from physics, and it does not need to. Natural selection is a logically separate claim — that heritable variation plus differential reproduction produces adaptation — that would remain true in a hypothetical universe with a different thermodynamic arrow, or none at all, provided that universe still somehow supported heredity. What the physics in this article supplies is the reason no such universe was ever going to get the chance: without a low-entropy past there is no preferred direction for anything to accumulate in; without decoherence and Landauer’s bound there is no such thing as a record that stays written; without fluctuation theorems there is no exact…
Equation guide → · Article →Equation 24 · Physics
The Statistical Mechanics of Irreversibility at Molecular Scale
This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.
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.
Equation guide → · Article →Equation 25 · Physics
The Statistical Mechanics of Irreversibility at Molecular Scale
This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.
This distinction is especially relevant to claims about artificial intelligence and computing energy. Landauer’s limit is many orders of magnitude below the energy of contemporary digital operations. Datacenter consumption is governed by device capacitance, leakage, memory movement, networking, cooling, utilization, and software workload. Invoking T2 does not by itself predict an accelerator’s efficiency. It identifies a physical floor for a particular logical operation and clarifies why reversible computing is conceptually interesting.
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