It is possible to noiselessly amplify a quantum state by first deliberately increasing its noise. This paradoxical result may have important applications in quantum communication and metrology.
This is a preview of subscription content, log in via an institution to check access.
References
Usuga, M. A. et al. Nature Phys. 6, 767–771 (2010).
Louisell, W. H. et al. Phys. Rev. 124, 1646–1654 (1961).
Haus, H. A. & Mullen, J. A. Phys. Rev. 128, 2407–2413 (1962).
Xiang, G. Y., Ralph, T. C., Lund, A. P., Walk, N. & Pryde, G. J. Nature Photon. 4, 316–319 (2010).
Ferreyrol, F. et al. Phys. Rev. Lett. 104, 123603 (2010).
Marek, P. & Filip, R. Phys. Rev. A 81, 022302 (2010).
Fiurášek, J. Phys. Rev. A 80, 053822 (2009).
Shimozawa, T., Murakami, J. & Kumagai, T. Sensors and Sensing in Biology and Engineering (eds Barth, F. G., Humphrey, J. A. C & Secomb, T. W.) 145–157 (Springer, 2003).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Dunningham, J. Needling the haystack. Nature Phys 6, 718–719 (2010). https://doi.org/10.1038/nphys1795
Published:
Issue Date:
DOI: https://doi.org/10.1038/nphys1795
- Springer Nature Limited