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Maximizing the speed and precision of communication while minimizing powerdissipation is a fundamental engineering design goal. Also, biological systemsachieve remarkable speed, precision and power efficiency using poorlyunderstood physical design principles. Powerful theories like informationtheory and thermodynamics do not provide general limits on power, precision andspeed. Here we go beyond these classical theories to prove that the product ofprecision and speed is universally bounded by power dissipation in any physicalcommunication channel whose dynamics is faster than that of the signal.Moreover, our derivation involves a novel connection between friction andinformation geometry. These results may yield insight into both the engineeringdesign of communication devices and the structure and function of biologicalsignaling systems.

A universal tradeoff between power, precision and speed in physical communication