
<p>This episode of the <em>Physics World Weekly</em> podcast features <a href="https://perimeterinstitute.ca/people/alex-may">Alex May</a>, whose research explores the intersection of quantum gravity and quantum information theory. Based at Canada’s <a href="https://perimeterinstitute.ca/">Perimeter Institute for Theoretical Physics</a>, May explains how ideas being developed in the burgeoning field of quantum information theory could help solve one of the most enduring mysteries in physics – how to reconcile quantum mechanics with Einstein’s general theory of relativity, creating a viable theory of quantum gravity.</p>

<p>This interview was recorded in autumn 2025 when I had the pleasure of visiting the Perimeter Institute and speaking to four physicists about their research. This is the last of those conversations to appear on the podcast.</p>
<p>The first interview in this series from the Perimeter Institute was with Javier Toledo-Marín, “<a href="https://physicsworld.com/a/quantum-computing-and-ai-join-forces-for-particle-physics/">Quantum computing and AI join forces for particle physics</a>”; the second was with Bianca Dittrich, “<a href="https://physicsworld.com/a/quantum-gravity-we-explore-spin-foams-and-other-potential-solutions/">Quantum gravity: we explore spin foams and other potential solutions to this enduring challenge</a>“; and the third was with Tim Hsieh, “<a href="https://physicsworld.com/a/building-a-quantum-future-using-topological-phases-of-matter-and-error-correction/">Building a quantum future using topological phases of matter and error correction</a>”.</p>
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<p><a href="https://summit.aps.org/"><img fetchpriority="high" decoding="async" class="alignnone wp-image-125085 size-post-featured-image" src="https://physicsworld.com/wp-content/uploads/2025/11/APS-logo-635x144.jpg" alt="APS logo" width="635" height="144" srcset="https://physicsworld.com/wp-content/uploads/2025/11/APS-logo-635x144.jpg 635w, https://physicsworld.com/wp-content/uploads/2025/11/APS-logo-211x48.jpg 211w, https://physicsworld.com/wp-content/uploads/2025/11/APS-logo-317x72.jpg 317w, https://physicsworld.com/wp-content/uploads/2025/11/APS-logo-720x164.jpg 720w, https://physicsworld.com/wp-content/uploads/2025/11/APS-logo-350x80.jpg 350w, https://physicsworld.com/wp-content/uploads/2025/11/APS-logo-257x58.jpg 257w, https://physicsworld.com/wp-content/uploads/2025/11/APS-logo-300x68.jpg 300w, https://physicsworld.com/wp-content/uploads/2025/11/APS-logo-160x36.jpg 160w, https://physicsworld.com/wp-content/uploads/2025/11/APS-logo-128x29.jpg 128w, https://physicsworld.com/wp-content/uploads/2025/11/APS-logo.jpg 726w" sizes="(max-width: 635px) 100vw, 635px" /></a></p>
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<p>This episode is supported by the <a href="https://summit.aps.org/">APS Global Physics Summit</a>, which takes place on 15–20 March, 2026, in Denver, Colorado, and online.</p>
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