Abstract
Arising from: R. M. Stevenson et al. Nature 439, 179–182 (2006)10.1038/nature04446; Stevenson et al. reply
The realization of an entangled photon source will be of great importance in quantum information — for example, for quantum key distribution and quantum computation — and Stevenson et al.1 have described such a source. However, we show here that first, their source is not entangled; second, they use inappropriate entanglement indicators that rely on assumptions invalidated by their data; and third, their source has insignificant entanglement even after simulating subtraction of the significant quantity of background noise. We therefore find that the standard of proof required for a semiconductor source of triggered entangled photon pairs has not been met by Stevenson et al.1.
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References
Stevenson, R. M. et al. Nature 439, 179–182 (2006).
Bennett, C. H., DiVincenzo, D. P., Smolin, J. A. & Wootters, W. K. Phys. Rev. A 54, 3824–3851 (1996).
Wootters, W. K. Phys. Rev. Lett. 80, 2245–2248 (1998).
Coffman, V., Kundu, J. & Wootters, W. K. Phys. Rev. A 61, 052306 (2000).
White, A. G., James, D. F. V., Munro, W. J. & Kwiat, P. G. Phys. Rev. A 65, 012301 (2001).
Peres, A. Phys. Rev. Lett. 77, 1413–1415 (1996).
James, D. F. V., Kwiat, P. G., Munro, W. J. & White, A. G. Phys. Rev. A 64, 052312 (2001).
Munro, W. J., James, D. F. V., White, A. G. & Kwiat, P. G. Phys. Rev. A 64, 030302 (2001).
Young, R. J. et al. N. J. Phys. 8, 29 (2006).
Stokes, G. G. Trans. Camb. Phil. Soc. 9, 399–416 (1852).
Mandel, L. & Wolf, E. in Optical Coherence and Quantum Optics 353–354 (Cambridge University Press, Cambridge, 1995).
Vasanelli, A., Ferreira, R. & Bastard, G. Phys. Rev. Lett. 89, 216804 (2002).
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Gilchrist, A., Resch, K. & White, A. Source of triggered entangled photon pairs?. Nature 445, E4–E5 (2007). https://doi.org/10.1038/nature05546
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DOI: https://doi.org/10.1038/nature05546
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