Quantum Mechanics Might Be a Secret Key to Secure Communication

Quantum Mechanics Might Be a Secret Key to Secure Communication

Author: Quanta Magazine April 28, 2026 Duration: 27:05
Together, Charles Bennett and Gilles Brassard figured out how to use the laws of quantum physics to keep secret messages safe from eavesdroppers. Their efforts have earned them one of the highest awards in computing and a $1 million prize. On this episode of The Quanta Podcast, host Samir Patel speaks with staff writer Ben Brubaker about this year’s Turing Prize winners, and some of the most important concepts in quantum information science. This topic was covered in a recent column for Quanta Magazine.   Each week on The Quanta Podcast, Quanta Magazine editor in chief Samir Patel speaks with the people behind the award-winning publication to navigate through some of the most important and mind-expanding questions in science and math. Audio coda by Charles Bennett/IBM

Hosted by Quanta Magazine Editor-in-Chief Samir Patel, The Quanta Podcast is a series of deep, thoughtful conversations with the researchers and thinkers whose work is shaping our fundamental understanding of reality. Each episode delves into a single, profound idea, whether it's a new discovery about black holes, a breakthrough in cellular biology, or an elegant proof in pure mathematics. These aren't surface-level summaries; they are guided tours through complex concepts, made accessible through patient explanation and genuine curiosity. You'll hear directly from the scientists and mathematicians themselves, the very people behind the groundbreaking stories in Quanta Magazine, as they explain not just what they found, but how they think and why it matters. The discussions naturally unfold to explore the implications of these discoveries, revealing the often-surprising connections between different fields and the enduring mysteries that lie just beyond our current grasp. This podcast serves as an audio companion to the magazine's award-winning journalism, designed for anyone with a restless mind eager to peer over the edge of the known world. It’s about the process of inquiry as much as the answers, offering a rare and intimate look at the cutting edge of science and math from those who are actively pushing it forward.
Author: Language: en-us Episodes: 100

The Quanta Podcast
Podcast Episodes
The Mystery of the Early Universe’s Little Red Dots [not-audio_url] [/not-audio_url]

Duration: 25:11
Recently, astrophysicists identified something peculiar: An enormous “naked” black hole with no galaxy in sight. On this week’s episode, host Samir Patel speaks with physics staff writer Charlie Wood about how the strang…
A Biography of Earth Across the Age of Animals [not-audio_url] [/not-audio_url]

Duration: 26:59
Thanks to a delicate interplay between plate tectonics and life, Earth’s thermostat has kept animal life thriving on our planet for half a billion years. On this week’s episode, host Samir Patel speaks with contributing…
What We Learn From Running ‘Life’ in Reverse [not-audio_url] [/not-audio_url]

Duration: 24:51
Imagine a set of simple building blocks that can self-assemble into any shape you want. The possibilities for such a technology could be boundless. Inspired by nature, “complexity engineering” seeks to design such blocks…
The Math of Catastrophe [not-audio_url] [/not-audio_url]

Duration: 27:35
Around 6,000 years ago, the Sahara was a lush grassland. Then, as if a switch flipped, it began to dry out, becoming the desert that we know today. Tipping points are moments in Earth’s history where gradual change sudde…
Audio Edition: Quantum Speedup Found for Huge Class of Hard Problems [not-audio_url] [/not-audio_url]

Duration: 11:37
It’s been difficult to find important questions that quantum computers can answer faster than classical machines, but a new algorithm appears to do it for some critical optimization tasks. The story Quantum Speedup Found…
What Can a Cell Remember? [not-audio_url] [/not-audio_url]

Duration: 23:55
“Memory” means many things to many people, and in many fields. We tend to understand memory to be a phenomenon that happens primarily in the brain, but in recent years, researchers have understood memory as a physical ph…
Climate Modeling Is at a Crossroads [not-audio_url] [/not-audio_url]

Duration: 27:00
The climate is changing. So is the way we understand the climate. On this week's episode, contributing writer Zack Savitsky joins host Samir Patel to discuss his recent reporting on the rich history and uncertain future…
Audio Edition: A New, Chemical View of Ecosystems [not-audio_url] [/not-audio_url]

Duration: 15:15
Rare and powerful compounds, known as keystone molecules, can build a web of invisible interactions among species. The story A New, Chemical View of Ecosystems first appeared on Quanta Magazine.
AI's Dark Side Is Only a Nudge Away [not-audio_url] [/not-audio_url]

Duration: 24:08
In order to trust machines with important jobs, we need a high level of confidence that they share our values and goals. Recent work shows that this “alignment” can be brittle, superficial, even unstable. In one study, a…