Nonlinear two-level dynamics of quantum time crystals
arXiv:2107.05236 · doi:10.1038/s41467-022-30783-w
Abstract
A time crystal is a macroscopic quantum system in periodic motion in its ground state, stable only if isolated from energy exchange with the environment. For this reason, coupling separate time crystals is challenging, and time crystals in a dynamic environment have yet not been studied. In our experiments, two coupled time crystals made of spin-wave quasiparticles (magnons) form a macroscopic two-level system. The two levels evolve in time as determined intrinsically by a nonlinear feedback. Magnons move from the ground level to the excited level driven by the Landau-Zener effect, combined with Rabi population oscillations. We thus demonstrate how to arrange spontaneous dynamics between interacting time crystals. Our experiments allow access to every aspect and detail of the interaction in a single run of the experiment, inviting technological exploitation-- potentially even at room temperature.
14 pages, 5 figures
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Cited by in corpus (15)
- Colloquium: Quantum and Classical Discrete Time Crystals
- Classical analog of qubit logic based on a magnon Bose-Einstein condensate
- Boundary Time Crystals as AC sensors: enhancements and constraints
- Magnon Bose-Einstein condensates: from time crystals and quantum chromodynamics to vortex sensing and cosmology
- Transport of bound quasiparticle states in a two-dimensional boundary superfluid
- Time-crystalline behavior in central-spin models with Heisenberg interactions
- Prolonging a discrete time crystal by quantum-classical feedback
- Tunable nonlinear Landau-Zener tunnelings in a spin-orbit-coupled spinor Bose-Einstein condensate
- Emergence of spatial patterns and synchronization in superconducting time crystals
- Time crystal optomechanics
- Observation of tunable discrete time crystalline phases
- Formation of Complex Discrete Time Crystals with Ultracold Atoms
- Unpolarized prethermal discrete time crystal
- Quantum sensing with discrete time crystals in the Lipkin-Meshkov-Glick Model
- Time dispersion in bound states