Metabolic quantum limit and holographic bound to the information capacity of magnetoencephalography

• URL: http://arxiv.org/abs/2511.06401v1
• Date: Sun, 09 Nov 2025 14:23:44 GMT
• Title: Metabolic quantum limit and holographic bound to the information capacity of magnetoencephalography
• Authors: E. Gkoudinakis, S. Li, I. K. Kominis,
• Abstract summary: Magnetoencephalography, the noninvasive measurement of magnetic fields produced by brain activity, utilizes quantum sensors like superconducting quantum interference devices or atomic magnetometers.<n>Here we derive a fundamental, technology-independent bound on the information that such measurements can convey.<n>For the geometry and metabolic power of the human brain the geometric bound is 6.6 Gbit/s.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Magnetoencephalography, the noninvasive measurement of magnetic fields produced by brain activity, utilizes quantum sensors like superconducting quantum interference devices or atomic magnetometers. Here we derive a fundamental, technology-independent bound on the information that such measurements can convey. Using the energy resolution limit of magnetic sensing together with the brain's metabolic power, we obtain a universal expression for the maximum information rate, which depends only on geometry, metabolism, and Planck's constant, and the numerical value of which is 2.6 Mbit/s. At the high bandwidth limit we arrive at a bound scaling linearly with the area of the current source boundary. We thus demonstrate a biophysical holographic bound for metabolically powered information conveyed by the magnetic field. For the geometry and metabolic power of the human brain the geometric bound is 6.6 Gbit/s.

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