Excited-State Phase Diagram of a Ferromagnetic Quantum Gas

Bernd Meyer-Hoppe; Fabian Anders; Polina Feldmann; Luis Santos; Carsten Klempt

doi:10.48550/arXiv.2301.10655

Excited-State Phase Diagram of a Ferromagnetic Quantum Gas

Bernd Meyer-Hoppe, Fabian Anders, Polina Feldmann, Luis Santos, Carsten Klempt

University of British Columbia

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Abstract

The ground-state phases of a quantum many-body system are characterized by an order parameter, which changes abruptly at quantum phase transitions when an external control parameter is varied. Interestingly, these concepts may be extended to excited states, for which it is possible to define equivalent excited-state quantum phase transitions. However, the experimental mapping of a phase diagram of excited quantum states has not yet been demonstrated. Here we present the experimental determination of the excited-state phase diagram of an atomic ferromagnetic quantum gas, where, crucially, the excitation energy is one of the control parameters. The obtained phase diagram exemplifies how the extensive Hilbert state of quantum many-body systems can be structured by the measurement of well-defined order parameters.

Originalsprache	Englisch
Aufsatznummer	243402
Fachzeitschrift	Physical Review Letters
Jahrgang	131
Ausgabenummer	24
Elektronisch veröffentlicht (E-Pub)	13 Dez. 2023
DOIs	https://doi.org/10.48550/arXiv.2301.10655 https://doi.org/10.1103/PhysRevLett.131.243402
Publikationsstatus	Veröffentlicht - Dez. 2023

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie

Zugriff auf Dokument

10.48550/arXiv.2301.10655Lizenz: CC BY 4.0
10.1103/PhysRevLett.131.243402Lizenz: CC BY 4.0

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Verknüpfung zur Publikation in Scopus

DQ-mat: Sonderforschungsbereich 1227/2: Designte Quantenzustände der Materie - Erzeugung, Manipulation und Detektion für metrologische Anwendungen und Tests fundamentaler Physik
Schmidt, P. O. (Projektleiter*in (Principal Investigator))
1 Juli 2020 → 30 Juni 2024
Projekt: Forschung
DQ-mat: Sonderforschungsbereich 1227/2, Teilprojekt A02: Verschränkung im Impulsraum
Klempt, C. (Projektleiter*in (Principal Investigator)) & Santos, L. S. (Projektleiter*in (Principal Investigator))
1 Juli 2020 → 30 Juni 2024
Projekt: Forschung
QuantumFrontiers: Exzellenzcluster 2123/1: Licht und Materie an der Quantengrenze
Schmidt, P. O. (Projektleiter*in (Principal Investigator)), Ospelkaus-Schwarzer, S. (Projektleiter*in (Principal Investigator)), Chichkov, B. (Projektleiter*in (Principal Investigator)), Danzmann, K. (Projektleiter*in (Principal Investigator)), Ertmer, W. (Projektleiter*in (Principal Investigator)), Hammerer, K. J. (Projektleiter*in (Principal Investigator)), Haug, R. (Projektleiter*in (Principal Investigator)), Heinzel, G. (Projektleiter*in (Principal Investigator)), Heurs, M. (Projektleiter*in (Principal Investigator)), Klempt, C. (Projektleiter*in (Principal Investigator)), Kroker, S. (Projektleiter*in (Principal Investigator)), Lisdat, C. (Projektleiter*in (Principal Investigator)), Mehlstäubler, T. (Projektleiter*in (Principal Investigator)), Müller, J. (Projektleiter*in (Principal Investigator)), Ospelkaus, C. (Projektleiter*in (Principal Investigator)), Rasel, E. M. (Projektleiter*in (Principal Investigator)), Recher, P. (Projektleiter*in (Principal Investigator)), Santos, L. S. (Projektleiter*in (Principal Investigator)), Schilling, M. (Projektleiter*in (Principal Investigator)), Schlickum, U. (Projektleiter*in (Principal Investigator)), Schumacher, H. W. (Projektleiter*in (Principal Investigator)), Surzhykov, A. (Projektleiter*in (Principal Investigator)), Waag, A. (Projektleiter*in (Principal Investigator)), Werner, R. (Projektleiter*in (Principal Investigator)) & Willke, B. (Projektleiter*in (Principal Investigator))
1 Jan. 2019 → 31 Dez. 2025
Projekt: Forschung

Dieses zitieren

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title = "Excited-State Phase Diagram of a Ferromagnetic Quantum Gas",

abstract = " The ground-state phases of a quantum many-body system are characterized by an order parameter, which changes abruptly at quantum phase transitions when an external control parameter is varied. Interestingly, these concepts may be extended to excited states, for which it is possible to define equivalent excited-state quantum phase transitions. However, the experimental mapping of a phase diagram of excited quantum states has not yet been demonstrated. Here we present the experimental determination of the excited-state phase diagram of an atomic ferromagnetic quantum gas, where, crucially, the excitation energy is one of the control parameters. The obtained phase diagram exemplifies how the extensive Hilbert state of quantum many-body systems can be structured by the measurement of well-defined order parameters. ",

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author = "Bernd Meyer-Hoppe and Fabian Anders and Polina Feldmann and Luis Santos and Carsten Klempt",

note = "We thank A. Smerzi, L. Pezz`e, and M. Gessner for inspiring discussions. We acknowledge financial support from the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—Project-ID 274200144—SFB 1227 DQ-mat within the project A02 and under Germany{\textquoteright}s Excellence Strategy EXC-2123 QuantumFrontiers—390837967. F. A. and B. M.-H. acknowledge support from the Hannover School for Nanotechnology (HSN). P. F. acknowledges support from the Canada First Research Excellence Fund, Quantum Materials and Future Technologies Program. B.M.-H. and F. A. performed the experiments. B. M.-H., F. A., and P. F. analyzed the data. C. K. and L. S. conceived and designed the experiments with all authors contributing. The manuscript was written by all authors.",

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Excited-State Phase Diagram of a Ferromagnetic Quantum Gas

Abstract

ASJC Scopus Sachgebiete

Zugriff auf Dokument

Andere Dateien und Links

Projekte

DQ-mat: Sonderforschungsbereich 1227/2: Designte Quantenzustände der Materie - Erzeugung, Manipulation und Detektion für metrologische Anwendungen und Tests fundamentaler Physik

DQ-mat: Sonderforschungsbereich 1227/2, Teilprojekt A02: Verschränkung im Impulsraum

QuantumFrontiers: Exzellenzcluster 2123/1: Licht und Materie an der Quantengrenze

Dieses zitieren