Spontaneous breaking of a discrete time-translation symmetry

Spontaneous symmetry breaking is a ubiquitous concept and is well described in many textbooks of physics. However, direct observation of spontaneous symmetry breaking is lacking. Here we present the observation and analysis of a spontaneously broken discrete time-translation symmetry in our driven system. We experimentally find a 50-50 split between two stable and temporal-distinct solutions, indicative of the breaking of a Z(2) (Isinglike) time-translation symmetry. The experiment allows for further exploration of the symmetry breaking in our discrete time crystal and for engineering excitations in space and time in the quantum domain.

Automated summary

This study presents the observation and analysis of a spontaneously broken discrete time-translation symmetry in a driven system, showing a 50-50 split between two stable and temporal-distinct solutions. The experiment allows for further exploration of symmetry breaking in the discrete time crystal and for engineering excitations in space and time in the quantum domain.