Experimental Verification of Decoherence-Free Subspaces
Abstract
Using spontaneous parametric down-conversion, we produce polarization-entangled states of two photons and characterize them using two-photon tomography to measure the density matrix. A controllable decoherence is imposed on the states by passing the photons through thick, adjustable birefringent elements. When the system is subject to collective decoherence, one particular entangled state is seen to be decoherence-free, as predicted by theory. Such decoherence-free systems may have an important role for the future of quantum computation and information processing.
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Grover's search algorithm has been realized by Kwiat et al. (2000) by designing an optical implementation.
“The Grover's search algorithm (Grover, 1997) has been realized by Kwiat et al. (2000) by designing an optical”
From Multiphoton entanglement and interferometry (2012) · cites this paper as Kwiat et al. (2000)
Decoherence-free subspaces have been experimentally realized using two photons by Kwiat et al. (2000) and four photons by Bourennane et al. (2004b).
“Decoherence-free subspaces, a type of passive error-preventing codes, have been experimentally realized using two photons by Kwiat et al. (2000) and four photons by Bourennane et al. (2004b).”
From Multiphoton entanglement and interferometry (2012) · cites this paper as Kwiat et al. (2000)
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“Experimental realization of decoherence-free subspaces with photons was reported by Kwiat et al. (2000), Altepeter et al. (2004), and Bourennane et al. (2004), and applications of decoherence-free subspace were demonstrated for an optical quantum-computing algorithm (Mohseni et al., 2003) and for…”
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- Authors
- Kwiat, P. G., Berglund, A. J., Altepeter, J. B., & White, A. G.
- Affiliations
- Los Alamos National Laboratory (US)
- Corresponding author
- Kwiat, Paul G.
- Berglund, Andrew J.
- Venue
- Science
- Published
- 2000-10-20
- Volume
- 290
- Issue
- 5491
- Pages
- 498-501
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W1971160181
- Cited by
- 519
- References
- 7
- Citations by year
- 2026: 11 · 2025: 15 · 2024: 21 · 2023: 25 · 2022: 25 · 2021: 23 · 2020: 17 · 2019: 22 · 2018: 20 · 2017: 21 · 2016: 34 · 2015: 27 · 2014: 25 · 2013: 15 · 2012: 23
- FWCI
- 18.74
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Science (publishedVersion)
- PubMed (publishedVersion)
- CaltechAUTHORS (California Institute of Technology) (submittedVersion)
- 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 › Computer Science › Artificial Intelligence › Quantum Computing Algorithms and Architecture
- Keywords
- decoherence-free subspace, polarization-entangled photons, spontaneous parametric down-conversion, collective decoherence, birefringent elements, quantum computing
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