Hyper-entangled states
Abstract
Entangled states are key ingredients to the new field of quantum information, including quantum dense coding, teleportation, and computation. However, only a relatively small class of entangled states has been investigated experimentally, or even discussed extensively. In particular, efforts to date have focused on two particles entangled in a single degree of freedom, for example polarization, or energy, or momentum direction. Novel phase-matching arrangements in spontaneous parametric down-conversion allow the preparation of pairs of photons that are simultaneously entangled in all of these. We shall call such a multiply-entangled state ‚hyper-entangled‘. In addition, an even more general state–-a non-maximally entangled state–-should be realizable, in which the amplitudes of the contributing terms are not equal.
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References 38 · Cited by 368
- Authors
- Kwiat, P. G.
- Affiliations
- Los Alamos National Laboratory (US)
- Corresponding author
- Kwiat, Paul G.
- ORCID
- Kwiat, Paul G.
- Venue
- Journal of Modern Optics
- Publisher
- Informa UK Limited
- Published
- 1997-11
- Volume
- 44
- Issue
- 11-12
- Pages
- 2173-2184
- ISSN
- 0950-0340 (ISSN-L)
- 1362-3044
- OpenAlex
- W2038159077
- Cited by
- 368
- References
- 38
- Citations by year
- 2026: 17 · 2025: 22 · 2024: 18 · 2023: 15 · 2022: 24 · 2021: 16 · 2020: 20 · 2019: 28 · 2018: 24 · 2017: 22 · 2016: 9 · 2015: 18 · 2014: 17 · 2013: 5 · 2012: 17
- FWCI
- 4.25
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Modern Optics (publishedVersion)
- Topics
- Physical Sciences › Computer Science › Artificial Intelligence › 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 optics and atomic interactions
- Keywords
- multipartite entanglement, spontaneous parametric down-conversion, non-maximally entangled states, photon pairs, phase matching, quantum information, polarization entanglement, momentum entanglement
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