Projects per year
Abstract
A time crystal is a macroscopic quantum system in periodic motion in its ground state. In our experiments, two coupled time crystals consisting of spin-wave quasiparticles (magnons) form a macroscopic two-level system. The two levels evolve in time as determined intrinsically by a nonlinear feedback, allowing us to construct spontaneous two-level dynamics. In the course of a level crossing, magnons move from the ground level to the excited level driven by the Landau-Zener effect, combined with Rabi population oscillations. We demonstrate that magnon time crystals allow access to every aspect and detail of quantum-coherent interactions in a single run of the experiment. Our work opens an outlook for the detection of surface-bound Majorana fermions in the underlying superfluid system, and invites technological exploitation of coherent magnon phenomena – potentially even at room temperature.
Original language | English |
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Article number | 3090 |
Pages (from-to) | 1-9 |
Number of pages | 9 |
Journal | Nature Communications |
Volume | 13 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2 Jun 2022 |
MoE publication type | A1 Journal article-refereed |
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Dive into the research topics of 'Nonlinear two-level dynamics of quantum time crystals'. Together they form a unique fingerprint.Projects
- 2 Finished
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TOPVAC: From Topological Matter to Relativistic Quantum Vacuum
Volovik, G. (Principal investigator)
01/10/2016 → 30/09/2022
Project: EU: ERC grants
Equipment
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OtaNano – Low Temperature Laboratory
Savin, A. (Manager) & Rissanen, A. (Other)
OtaNanoFacility/equipment: Facility
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