Cited by 8,290Quantum Information and CryptographyQuantum Mechanics and ApplicationsQuantum many-body systems

The DOI matches its Crossref record; 22 of the 22 references it cites were found in a registry or an index.

Entanglement of Formation of an Arbitrary State of Two Qubits

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Wootters, William K.·1998·Physical Review Letters

Abstract

The entanglement of a pure state of a pair of quantum systems is defined as the entropy of either member of the pair. The entanglement of formation of a mixed state $\ensuremath{\rho}$ is the minimum average entanglement of an ensemble of pure states that represents \ensuremath{\rho}. An earlier paper conjectured an explicit formula for the entanglement of formation of a pair of binary quantum objects (qubits) as a function of their density matrix, and proved the formula for special states. The present paper extends the proof to arbitrary states of this system and shows how to construct entanglement-minimizing decompositions.

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Metadata

Authors
Wootters, W. K.
Affiliations
Williams College (US)
Corresponding author
Wootters, William K.
Venue
Physical Review Letters
Published
1998-03-09
Volume
80
Issue
10
Pages
2245-2248
ISSN
  • 0031-9007 (ISSN-L)
  • 1079-7114
OpenAlex
W2011208902
Cited by
8,290
References
21
Citations by year
2026: 320 · 2025: 387 · 2024: 339 · 2023: 340 · 2022: 349 · 2021: 371 · 2020: 328 · 2019: 336 · 2018: 325 · 2017: 301 · 2016: 406 · 2015: 339 · 2014: 381 · 2013: 368 · 2012: 381
FWCI
62.08
Type
journal article
Language
en
Open access
Locations
  • Physical Review Letters (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Information and Cryptography
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum many-body systems
Keywords
entanglement of formation, two-qubit states, mixed states, density matrix, quantum entanglement

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