Papers › Spontaneous fluctuation-symmetry breaking and the Landauer principle
Spontaneous fluctuation-symmetry breaking and the Landauer principle
Lorenzo Buffoni, Michele Campisi
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We study the problem of the energetic cost of information erasure by looking at it through the lens of the Jarzynski equality. We observe that the Landauer bound, ⟨W ⟩≥kT ln2, on average dissipated work ⟨W ⟩ associated to an erasure process, literally emerges from the underlying second law bound as formulated by Kelvin, ⟨W ⟩≥0, as consequence of a spontaneous breaking of the Crooks-Tasaki fluctuation-symmetry, that accompanies logical irreversibility. We illustrate and corroborate this insight with numerical simulations of the process of information erasure performed on a 2D Ising ferromagnet.
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