Fermionic entanglement in itinerant systems
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We study pairwise quantum entanglement in systems of fermions itinerant in a lattice from a second-quantized perspective. Entanglement in the grand-canonical ensemble is studied, both for energy eigenstates and for the thermal state. Relations between entanglement and superconducting correlations are discussed in a BCS-like model and for η-pair superconductivity.
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A highly entangled ground state is at the heart of a large variety of collective quantum phenomena.
“On the other hand, entanglement is appointed to play a central role in the study of strongly correlated quantum systems [7][8][9], since a highly entangled ground state is at the heart of a large variety of collective quantum phenomena.”
From Entanglement in Quantum Critical Phenomena (2003) · cites this paper as [9]
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- Authors
- Zanardi, P., & Wang, X.
- Affiliations
- Institute for Scientific Interchange (IT)
- ORCID
- Wang, Xiaoguang
- Venue
- Journal of Physics A: Mathematical and General
- Publisher
- IOP Publishing
- Published
- 2002-09-05
- Volume
- 35
- Issue
- 37
- Pages
- 7947-7959
- ISSN
- 0305-4470 (ISSN-L)
- OpenAlex
- W1973324548
- Cited by
- 125
- References
- 38
- Citations by year
- 2026: 2 · 2025: 1 · 2024: 1 · 2022: 1 · 2021: 1 · 2020: 2 · 2019: 3 · 2018: 5 · 2017: 9 · 2016: 4 · 2015: 4 · 2014: 6 · 2013: 2 · 2012: 4
- FWCI
- 10.48
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Journal of Physics A Mathematical and General (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum many-body systems
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Cold Atom Physics and Bose-Einstein Condensates
- Keywords
- fermionic entanglement, itinerant fermions, grand canonical ensemble, thermal states, superconducting correlations, BCS theory, second quantization
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