*Shumpei Yamamoto, Sosuke Ito, Naoto Shiraishi, and Takahiro Sagawa,

Linear irreversible thermodynamics and Onsager reciprocity for information-driven engines,

Phyical Review E 94, 052121/1-11 (2016).

[Summary] In the recent progress in nonequilibrium thermodynamics, information has been recognized as a kind of thermodynamic resource that can drive thermodynamic current without any direct energy injection. In this paper, we establish the framework of linear irreversible thermodynamics for a broad class of autonomous information processing. In particular, we prove that the Onsager reciprocity holds true with information: The linear response matrix is well-defined and is shown symmetric with both of the information affinity and the conventional thermodynamic affinity. As an application, we derive a universal bound for the efficiency at maximum power for information-driven engines in the linear regime. Our result reveals the fundamental role of information flow in linear irreversible thermodynamics.