Quantum Test With Human Minds Could Challenge Physics

Compiled by the editorial desk with reference to the original research paper and public statements from the Perimeter Institute.

For decades, quantum entanglement has puzzled physicists, with Albert Einstein famously calling it “spooky action at a distance.” Now, a theoretical physicist at the Perimeter Institute in Canada has proposed an experiment that could test whether the human mind, rather than random number generators, can influence the outcomes of entangled particle measurements. The study, published online earlier this month, outlines a Bell test variant that uses 100 human participants whose brain activity, recorded via EEG headsets, would determine the measurement settings at two distant locations.

The core idea builds on the work of physicist John Bell, who in 1964 devised a test to verify whether entangled particles indeed influence each other instantaneously, regardless of the distance separating them. In a standard Bell test, a pair of entangled particles is sent to two separate locations, A and B. At each site, a device measures the particle's state, with the measurement settings chosen at random to ensure that neither location can know the other's setting. Historically, such tests have supported the quantum entanglement theory.

Lucien Hardy, the physicist behind the new proposal, suggests replacing the random number generators with human decision-making. In his experiment, 100 volunteers would be equipped with EEG headsets to read their brain activity. These signals would then be used to switch the settings on the measuring devices at locations A and B, which would be placed 100 kilometers apart. The key question is whether the correlations between measurements, when set by human minds, would differ from those predicted by standard quantum theory.

“The radical possibility we wish to investigate is that, when humans are used to decide the settings (rather than various types of random number generators), we might then expect to see a violation of Quantum Theory in agreement with the relevant Bell inequality,” Hardy wrote in the paper.

If the results deviate from previous Bell tests, it could indicate that the measurements are being influenced by factors outside the realm of standard physics. Hardy acknowledged the potential significance, saying, “If you only saw a violation of quantum theory when you had systems that might be regarded as conscious, humans or other animals, that would certainly be exciting. I can’t imagine a more striking experimental result in physics than that.”

The implications could extend to the nature of consciousness itself. The experiment draws on the philosophical concept of mind-matter duality, first articulated by René Descartes, which posits that the mind exists outside the regular laws of physics and can intervene on the physical world. If the experiment yields a violation, it might suggest that human consciousness is not made of the same matter governed by physics, and that the mind could exercise free will independent of physical determinism.

Hardy cautioned that the experiment would not definitively settle the question of free will, but he noted, “It wouldn’t settle the question, but it would certainly have a strong bearing on the issue of free will.”

The proposal is in its early stages, with no timeline for implementation. However, it represents a novel intersection of quantum mechanics and neuroscience, potentially opening new avenues for understanding the relationship between mind and matter.