Magnonic time crystal with lasing coherence
Abstract
Discrete time crystals (DTC) can respond at an integer multiple of the drive period. Internal order-parameter measurements have advanced studies of this novel non-equilibrium phase of matter; however, turning this order into highly coherent, externally accessible radiation remains challenging: pump-driven nonlinear processes must supply sufficient gain to compensate dissipation while preserving subharmonic stability. Here we realize a room-temperature magnonic time crystal (MTC) with radiation of lasing coherence using a pump-induced magnon mode in yttrium iron garnet. A microwave beat drive produces robust period doubling over a finite parameter range, with spectral signatures of higher-order MTC at stronger driving. The emitted field exhibits linewidth narrowing to 260.0 Hz and a first-order correlation decay time of $995 μs$. Our model links this response to three-magnon confluence, yields a stability region consistent with experiment and predicts a possible transition to chaos. We further map the complex temporal dynamics into frequency-resolved nonlinear features for reservoir computing. These results bridge time-crystalline order and nonlinear information processing through intrinsic magnon-magnon interactions and lasing coherence.
Related
- In silico design of magnonic lasing in constricted waveguides
- Topological magnonic black-white hole crystal
- Fracture Mechanics and Self-Healing in Molecular Crystal Resonators for Lasing
- Floquet Engineering of Momentum Gaps in Magnonic Time Crystals: Slow-Drive Amplification and In-Gap Propagation
- Enhanced coherence of rare-earth nuclear spins in a crystal
BibTeX
@misc{song2026magnonic,
title = {{Magnonic time crystal with lasing coherence}},
author = {Jiantao Song and C. K. Wei and Shuhuan Ma and Yiming Pan and Zhijian Chen and Li Yu and Wei Lu and Bimu Yao},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.32199},
eprint = {2610.32199},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.32199},
}
RIS
TY - UNPB
TI - Magnonic time crystal with lasing coherence
AU - Jiantao Song
AU - C. K. Wei
AU - Shuhuan Ma
AU - Yiming Pan
AU - Zhijian Chen
AU - Li Yu
AU - Wei Lu
AU - Bimu Yao
PY - 2026
DA - 2026/10/23
PB - arXiv
DO - 10.48550/arxiv.2610.32199
UR - https://arxiv.org/abs/2610.32199
AB - Discrete time crystals (DTC) can respond at an integer multiple of the drive period. Internal order-parameter measurements have advanced studies of this novel non-equilibrium phase of matter; however, turning this order into highly coherent, externally accessible radiation remains challenging: pump-driven nonlinear processes must supply sufficient gain to compensate dissipation while preserving subharmonic stability. Here we realize a room-temperature magnonic time crystal (MTC) with radiation of lasing coherence using a pump-induced magnon mode in yttrium iron garnet. A microwave beat drive produces robust period doubling over a finite parameter range, with spectral signatures of higher-order MTC at stronger driving. The emitted field exhibits linewidth narrowing to 260.0 Hz and a first-order correlation decay time of $995 μs$. Our model links this response to three-magnon confluence, yields a stability region consistent with experiment and predicts a possible transition to chaos. We further map the complex temporal dynamics into frequency-resolved nonlinear features for reservoir computing. These results bridge time-crystalline order and nonlinear information processing through intrinsic magnon-magnon interactions and lasing coherence.
ER -