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Interferometric Order Parameter for Excited-State Quantum Phase Transitions in Bose-Einstein Condensates

Feldmann, Polina and Klempt, Carsten and Smerzi, Augusto and Santos, Luis and Gessner, Manuel (2020) Interferometric Order Parameter for Excited-State Quantum Phase Transitions in Bose-Einstein Condensates. Physical Review Letters, 126 (23), p. 230602. American Physical Society. doi: 10.1103/PhysRevLett.126.230602. ISSN 0031-9007.

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Official URL: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.126.230602

Abstract

Excited-state quantum phase transitions extend the notion of quantum phase transitions beyond the ground state. They are characterized by closing energy gaps amid the spectrum. Identifying order parameters for excited-state quantum phase transitions poses, however, a major challenge. We introduce a topological order parameter that distinguishes excited-state phases in a large class of mean-field models and can be accessed by interferometry in current experiments with spinor Bose-Einstein condensates. Our work opens a way for the experimental characterization of excited-state quantum phases in atomic many-body systems.

Item URL in elib:https://elib.dlr.de/187341/
Document Type:Article
Title:Interferometric Order Parameter for Excited-State Quantum Phase Transitions in Bose-Einstein Condensates
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Feldmann, PolinaInstitut für Theoretische Physik, Leibniz Universität Hannover, Appelstraße 2, 30167 Hannover, Germanyhttps://orcid.org/0000-0002-9516-1899
Klempt, CarstenCarsten.Klempt (at) dlr.deUNSPECIFIED
Smerzi, AugustoQSTAR, INO-CNR, and LENS, Largo Enrico Fermi 2, 50125 Firenze, ItalyUNSPECIFIED
Santos, LuisInstitut für Theoretische Physik, Leibniz Universität Hannover, Appelstraße 2, 30167 Hannover, GermanyUNSPECIFIED
Gessner, ManuelLaboratoire Kastler Brossel, ENS-Université PSL, CNRS, Sorbonne Université, Collège de France, 24 Rue Lhomond, 75005 Paris, FranceUNSPECIFIED
Date:4 November 2020
Journal or Publication Title:Physical Review Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:126
DOI :10.1103/PhysRevLett.126.230602
Page Range:p. 230602
Publisher:American Physical Society
ISSN:0031-9007
Status:Published
Keywords:Quanten-Phasenübergänge, Ordnungsparameter
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication, Navigation, Quantum Technology
DLR - Research area:Raumfahrt
DLR - Program:R KNQ - Communication, Navigation, Quantum Technology
DLR - Research theme (Project):R - Quantum metrology under zero-gravity conditions (QUAMETUS)
Location: Hannover
Institutes and Institutions:Institute for Satellite Geodesy and Inertial Sensing > Quantum Limits of Metrology
Deposited By: Klempt, Carsten
Deposited On:11 Jul 2022 08:17
Last Modified:11 Jul 2022 08:17

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