Interferometric Order Parameter for Excited-State Quantum Phase Transitions in Bose-Einstein Condensates
- authored by
- Polina Feldmann, Carsten Klempt, Augusto Smerzi, Luis Santos, Manuel Gessner
- 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.
- Organisation(s)
-
Institute of Theoretical Physics
Institute of Quantum Optics
QuantumFrontiers
CRC 1227 Designed Quantum States of Matter (DQ-mat)
- External Organisation(s)
-
University of Florence (UniFi)
College de France
DLR-Center for Lightweight Production Technology (ZLP)
- Type
- Article
- Journal
- Physical review letters
- Volume
- 126
- ISSN
- 0031-9007
- Publication date
- 10.06.2021
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- General Physics and Astronomy
- Electronic version(s)
-
https://arxiv.org/abs/2011.02823 (Access:
Open)
https://doi.org/10.1103/PhysRevLett.126.230602 (Access: Closed)
