The DOI matches its Crossref record; 4 of the 4 references it cites were found in a registry or an index.
Necessary and Sufficient Condition for Nonzero Quantum Discord
Open accessAbstract
Quantum discord characterizes "nonclassicality" of correlations in quantum mechanics. It has been proposed as the key resource present in certain quantum communication tasks and quantum computational models without containing much entanglement. We obtain a necessary and sufficient condition for the existence of nonzero quantum discord for any dimensional bipartite states. This condition is easily experimentally implementable. Based on this, we propose a geometrical way of quantifying quantum discord. For two qubits this results in a closed form of expression for discord. We apply our results to the model of deterministic quantum computation with one qubit, showing that quantum discord is unlikely to be the reason behind its speedup.
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Citations
Cites
Quantum Computation and Quantum Information
Nielsen, M. A., Chuang, I., & Grover, L. K. (2002) · American Journal of Physics · doi:10.1119/1.1463744 · Cited by 21,895
On the Einstein Podolsky Rosen paradox
Bell, J. S. (1964) · Physics Physique Fizika · doi:10.1103/physicsphysiquefizika.1.195 · Cited by 12,252
Quantum discord for two-qubit systems
Luo, S. (2008) · Physical Review A · doi:10.1103/physreva.77.042303 · Cited by 1,060
Experimental Quantum Computing without Entanglement
Lanyon, B. P., Barbieri, M., Almeida, M. P., & White, A. G. (2008) · Physical Review Letters · doi:10.1103/physrevlett.101.200501 · Cited by 874
Cited by
The classical-quantum boundary for correlations: Discord and related measures
Modi, K., Brodutch, A., Cable, H., Paterek, T., & Vedral, V. (2012) · Reviews of Modern Physics · doi:10.1103/revmodphys.84.1655 · Cited by 1,600
Self-citationQuantum discord as resource for remote state preparation
Dakić, B., Lipp, Y. O., Ma, X., Ringbauer, M., Kropatschek, S., Barz, S., Paterek, T., Vedral, V., Zeilinger, A., Brukner, Č., et al. (2012) · Nature Physics · doi:10.1038/nphys2377 · Cited by 462
Self-citationConverting Coherence to Quantum Correlations
Ma, J., Yadin, B., Girolami, D., Vedral, V., & Gu, M. (2016) · Physical Review Letters · doi:10.1103/physrevlett.116.160407 · Cited by 408
Self-citationOperational interpretations of quantum discord
Cavalcanti, D., Aolita, L., Boixo, S., Modi, K., Piani, M., & Winter, A. (2011) · Physical Review A · doi:10.1103/physreva.83.032324 · Cited by 347
Quantum discord of two-qubitXstates
Chen, Q., Zhang, C., Yu, S., Yi, X. X., & Oh, C. H. (2011) · Physical Review A · doi:10.1103/physreva.84.042313 · Cited by 300
Metadata
- Authors
- Dakić, B., Vedral, V., & Brukner, Č.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2010-11-02
- Volume
- 105
- Issue
- 19
- Pages
- 190502-190502
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2074333174
- Cited by
- 1,203
- References
- 4
- FWCI
- 111.21
- Type
- journal article
- Language
- en
- Open access
- green
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