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Multipartite entanglement serves as a faithful detector for quantum phase transitions
- Source :
- New Journal of Physics, Vol 26, Iss 2, p 023031 (2024)
- Publication Year :
- 2024
- Publisher :
- IOP Publishing, 2024.
-
Abstract
- We investigate quantum phase transitions (QPTs) in various spin chain systems using the multipartite entanglement measure $\tau_\mathrm{SEF}$ based on the monogamy inequality of squared entanglement of formation (EOF). Our results demonstrate that $\tau_\mathrm{SEF}$ is more effective and reliable than bipartite entanglement or bipartite correlation measures such as EOF, von Neumann entropy, and quantum discord in characterizing QPTs. $\tau_\mathrm{SEF}$ not only detects critical points that may go unnoticed by other detectors but also avoids the issue of singularity at non-critical points encountered by other measures. Furthermore, by applying $\tau_\mathrm{SEF}$ , we have obtained the phase diagram for the XY spin chain with three and four interactions and discovered a new quantum phase.
- Subjects :
- quantum phase transitions
quantum entanglement
spin chains
Science
Physics
QC1-999
Subjects
Details
- Language :
- English
- ISSN :
- 13672630
- Volume :
- 26
- Issue :
- 2
- Database :
- Directory of Open Access Journals
- Journal :
- New Journal of Physics
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.6c98e314ae040c0837917abd44b20cb
- Document Type :
- article
- Full Text :
- https://doi.org/10.1088/1367-2630/ad273a