Condensation and thermalization of an easy-plane ferromagnet in a spinor Bose gas
The extensive control of spin makes spintronics a promising candidate for future scalable quantum devices. For the generation of spin-superfluid systems, a detailed understanding of the build-up of coherence and relaxation is necessary. However, to determine the relevant parameters for robust cohere...
Gespeichert in:
| Hauptverfasser: | , , , , , |
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| Dokumenttyp: | Article (Journal) Kapitel/Artikel |
| Sprache: | Englisch |
| Veröffentlicht: |
12 May 2022
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| In: |
Arxiv
Year: 2022, Pages: 1-18 |
| DOI: | 10.48550/arXiv.2205.06188 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.48550/arXiv.2205.06188 Verlag, lizenzpflichtig, Volltext: http://arxiv.org/abs/2205.06188 
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| Verfasserangaben: | Maximilian Prüfer, Daniel Spitz, Stefan Lannig, Helmut Strobel, Jürgen Berges, and Markus K. Oberthaler |
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| 245 | 1 | 0 | |a Condensation and thermalization of an easy-plane ferromagnet in a spinor Bose gas |c Maximilian Prüfer, Daniel Spitz, Stefan Lannig, Helmut Strobel, Jürgen Berges, and Markus K. Oberthaler |
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| 520 | |a The extensive control of spin makes spintronics a promising candidate for future scalable quantum devices. For the generation of spin-superfluid systems, a detailed understanding of the build-up of coherence and relaxation is necessary. However, to determine the relevant parameters for robust coherence properties and faithfully witnessing thermalization, the direct access to space- and time-resolved spin observables is needed. Here, we study the thermalization of an easy-plane ferromagnet employing a homogeneous one-dimensional spinor Bose gas. Building on the pristine control of preparation and readout we demonstrate the dynamic emergence of long-range coherence for the spin field and verify spin-superfluidity by experimentally testing Landau's criterion. We reveal the structure of the emergent quasi-particles: one 'massive'(Higgs) mode, and two 'massless' (Goldstone) modes - a consequence of explicit and spontaneous symmetry breaking, respectively. Our experiments allow for the first time to observe the thermalization of an easy-plane ferromagnetic Bose gas; we find agreement for the relevant momentum-resolved observables with a thermal prediction obtained from an underlying microscopic model within the Bogoliubov approximation. Our methods and results pave the way towards a quantitative understanding of condensation dynamics in large magnetic spin systems and the study of the role of entanglement and topological excitations for its thermalization. | ||
| 650 | 4 | |a Condensed Matter - Quantum Gases | |
| 650 | 4 | |a Quantum Physics | |
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| 700 | 1 | |a Berges, Jürgen |d 1968- |e VerfasserIn |0 (DE-588)120062046 |0 (DE-627)080419755 |0 (DE-576)292020309 |4 aut | |
| 700 | 1 | |a Oberthaler, Markus K. |d 1968- |e VerfasserIn |0 (DE-588)1019626895 |0 (DE-627)690974175 |0 (DE-576)358472768 |4 aut | |
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