Status: Bibliographieeintrag
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| Verfasst von: | Murthy, Puneet A. [VerfasserIn]  |
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| | Defenu, Nicolò [VerfasserIn] |
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| | Bayha, Luca [VerfasserIn] |
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| | Holten, Marvin [VerfasserIn] |
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| | Preiss, Philipp [VerfasserIn] |
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| | Enss, Tilman [VerfasserIn] |
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| | Jochim, Selim [VerfasserIn] |
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| Titel: | Quantum scale anomaly and spatial coherence in a 2D Fermi superfluid |
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| Verf.angabe: | P.A. Murthy, N. Defenu, L. Bayha, M. Holten, P.M. Preiss, T. Enss, and S. Jochim |
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| E-Jahr: | 2018 |
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| Jahr: | 12 May 2018 |
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| Umfang: | 9 S. |
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| Fussnoten: | Gesehen am 07.12.2018 |
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| Titel Quelle: | Enthalten in: De.arxiv.org |
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| Ort Quelle: | [S.l.] : Arxiv.org, 1991 |
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| Jahr Quelle: | 2018 |
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| Band/Heft Quelle: | (2018), Artikel-ID 1805.04734 |
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| Abstract: | Quantum anomalies are violations of classical scaling symmetries caused by quantum fluctuations. Although they appear prominently in quantum field theory to regularize divergent physical quantities, their influence on experimental observables is difficult to discern. Here, we discovered a striking manifestation of a quantum anomaly in the momentum-space dynamics of a 2D Fermi superfluid of ultracold atoms. We measured the position and pair momentum distribution of the superfluid during a breathing mode cycle for different interaction strengths across the BEC-BCS crossover. Whereas the system exhibits self-similar evolution in the weakly interacting BEC and BCS limits, we found a violation in the strongly interacting regime. The signature of scale-invariance breaking is enhanced in the first-order coherence function. In particular, the power-law exponents that characterize long-range phase correlations in the system are modified due to this effect, indicating that the quantum anomaly has a significant influence on the critical properties of 2D superfluids. |
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| URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Volltext: http://arxiv.org/abs/1805.04734 |
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| Datenträger: | Online-Ressource |
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| Sprache: | eng |
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| Sach-SW: | Quantum Physics |
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| | Condensed Matter - Quantum Gases |
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| | Condensed Matter - Strongly Correlated Electrons |
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| K10plus-PPN: | 1584937483 |
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| Verknüpfungen: | → Sammelwerk |
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Quantum scale anomaly and spatial coherence in a 2D Fermi superfluid / Murthy, Puneet A. [VerfasserIn]; 12 May 2018 (Online-Ressource)
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