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Landauer 1961 — Irreversibility and Heat Generation in the Computing Process

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Landauer 1961 — Irreversibility and Heat Generation in the Computing Process

System notes

Erasing one bit of information in thermal equilibrium dissipates at least k_B T ln(2) joules of heat.

Only irreversible operations pay the energy tax; copying and reversible computation can avoid the cost entirely.

Information is physical — the bridge from bits to joules is a one-way toll; you cannot forget without heating the room.

Maxwell's demon must pay the erasure cost; the demon cannot extract work from heat without eventually erasing information and paying the Landauer toll.

The Landauer bound assumes thermal equilibrium; non-equilibrium reservoirs can achieve information erasure below kT ln(2).

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system
Erasing one bit of information in thermal equilibrium dissipates at least k_B T ln(2) joules of heat.
sources: landauer-1961
system
Only irreversible operations pay the energy tax; copying and reversible computation can avoid the cost entirely.
sources: landauer-1961, bennett-1973
system
Information is physical — the bridge from bits to joules is a one-way toll; you cannot forget without heating the room.
sources: landauer-1961
system
Maxwell's demon must pay the erasure cost; the demon cannot extract work from heat without eventually erasing information and paying the Landauer toll.
sources: landauer-1961, szilard-1929
system
The Landauer bound assumes thermal equilibrium; non-equilibrium reservoirs can achieve information erasure below kT ln(2).
sources: konopik-2020
2 more ranked claims
speculative0.70
If Maxwell's demon is already governed by the Second Law, Landauer's principle is redundant; if not, it is insufficient.
sources: earman-norton-1999
speculative0.60
Four independently derived methods (Shannon, Boltzmann, Kolmogorov, Landauer) converge on the same result: information and entropy are the same thing wearing different hats.
sources: shannon-1948, boltzmann-1877, kolmogorov-1965, landauer-1961
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What does the ledger say about this (system tier): "Erasing one bit of information in thermal equilibrium dissipates at least k_B T ln(2) joules of heat."?
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What does the ledger say about this (system tier): "Only irreversible operations pay the energy tax; copying and reversible computation can avoid the cost entirely."?
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What does the ledger say about this (system tier): "Maxwell's demon must pay the erasure cost; the demon cannot extract work from heat without eventually erasing information and paying the Lan…"?
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What does the ledger say about this (system tier): "The Landauer bound assumes thermal equilibrium; non-equilibrium reservoirs can achieve information erasure below kT ln(2)."?
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