Physicists have demonstrated that distant time crystals can somehow fall into the same rhythm, synchronising with each other across a semiconductor in a striking quantum effect. The finding, reported by ScienceDaily, is based on research into the non-local synchronisation of continuous time crystals.

Time crystals are one of the strangest ideas in modern physics. Ordinary crystals, like diamonds or salt, repeat their structure in space. Time crystals repeat in time instead, with their components moving in a regular, repeating cycle without any external push. They were only confirmed to exist in laboratories in the past decade.

Syncing across distance

The new research, published in the journal Nature, shows that separate time crystals formed in a semiconductor can lock into step with each other, communicating across the material in a non-local way. In other words, distant quantum systems that should behave independently somehow coordinate their rhythms.

This kind of synchronisation is familiar in the everyday world, from fireflies flashing in unison to pendulum clocks on the same wall swinging together. Seeing it happen between quantum time crystals, however, points to deep and poorly understood connections in the quantum realm.

Why it matters

Scientists believe that mastering time crystals could lead to advances in quantum computing, ultra-precise timekeeping and new kinds of sensors. A system that keeps perfect time without energy input is a dream component for quantum technologies, and the ability to synchronise many such systems is a crucial step toward practical devices.

The researchers say their work opens a new chapter in the study of these exotic phases of matter, and that semiconductors, the same materials that power computer chips, could become a platform for exploring them.

The concept of time crystals was first proposed by physicist Frank Wilczek in 2012, and the first laboratory demonstrations followed a few years later, earning a place among the most celebrated physics breakthroughs of the decade. Since then, scientists have created time crystals in systems ranging from trapped ions to diamond defects. The latest result pushes the frontier further by showing that these strange quantum objects can coordinate with each other over distance, a behaviour that theorists are now racing to explain.