In classical physics, memory is defined in a straightforward way. If a system’s future behavior depends only on its current condition, it is considered memoryless. If earlier states continue to ...

Quantum theory is often sold as a story about tiny particles, but its real disruption lands squarely on our everyday sense of what is real. At the smallest scales, the equations that power lasers, ...

Physicist Paul Davies looks back at the past century of quantum mechanics—the most disruptive theory in the history of modern ...

A newly derived “q-desic” equation suggests that quantum effects may subtly alter particle trajectories across the universe.

We’re celebrating 180 years of Scientific American. Explore our legacy of discovery and look ahead to the future. This year is the International Year of Quantum Science and Technology, according to ...

An “echo” that arrives before you finish speaking sounds like a glitch. In quantum hardware, that kind of self-interference ...

Quantum physics is often described as the most successful scientific framework in history. In its 100 years of existence, it has explained everything from the periodic table of the elements to how ...

As Joe Howlett points out, "the Schrödinger equation remains physicists’ foremost window into the quantum realm. It tells scientists how that strange world works; that is, how quantum objects interact ...

How much does a quantum measurement disturb what comes next? A team at TU Wien has discovered a surprisingly simple formula that sets a fundamental limit on the trade-off between measurement ...

Bridging quantum mechanics and crystallography, quantum crystallography offers precise analysis of crystalline materials, ...