Hawking time crystal

• URL: http://arxiv.org/abs/2507.10862v1
• Date: Mon, 14 Jul 2025 23:29:53 GMT
• Title: Hawking time crystal
• Authors: Juan Ramón Muñoz de Nova, Fernando Sols,
• Abstract summary: We report the numerical observation of a time crystal in a quantum black-hole laser.<n>The genuine spontaneous character of the symmetry breaking stems from the self-amplification of spontaneous Hawking radiation.
• Score: 49.1574468325115
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We report the numerical observation of a time crystal in a quantum black-hole laser (BHL), where the genuine spontaneous character of the symmetry breaking stems from the self-amplification of spontaneous Hawking radiation. The resulting Hawking time crystal (HTC) is characterized by the periodic dependence of the out-of-time density-density correlation function, while equal-time correlations are time-independent because they embody averages over different realizations with a random oscillation phase. The HTC can be regarded as a nonlinear periodic version of the Andreev-Hawking effect, signaled by anticorrelation bands resulting from the spontaneous, quantum emission of pairs of dispersive waves and solitons into the upstream and downstream regions.

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