Photonic Floquet time crystals

• URL: http://arxiv.org/abs/2012.08217v2
• Date: Tue, 19 Jan 2021 10:03:05 GMT
• Title: Photonic Floquet time crystals
• Authors: Bing Wang, Jiaqi Quan, Jianfei Han, Xiaopeng Shen, Hongwei Wu, and Yiming Pan
• Abstract summary: This study synthesizes a photonic material of Floquet time crystals and experimentally observes its indicative period-2T beating. We explicitly reconstruct a discrete time-crystalline ground state and reveal using an appropriately-designed photonic Floquet simulator the rigid period-doubling as a signature of the spontaneous breakage of the discrete time-translational symmetry.
• Score: 1.4542252187078732
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The public and scientists constantly have different perspectives. While on a time crystal, they stand in line and ask: What is a time crystal? Show me a material that is spontaneously crystalline in time? This study synthesizes a photonic material of Floquet time crystals and experimentally observes its indicative period-2T beating. We explicitly reconstruct a discrete time-crystalline ground state and reveal using an appropriately-designed photonic Floquet simulator the rigid period-doubling as a signature of the spontaneous breakage of the discrete time-translational symmetry. Unlike the result of the exquisite many-body interaction, the photonic time crystal is derived from a single-particle topological phase that can be extensively accessed by many pertinent nonequilibrium and periodically-driven platforms. Our observation will drive theoretical and technological interests toward condensed matter physics and topological photonics, and demystify time crystals for the non-scientific public.

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