Scientific Results

Heralded noiseless amplification and attenuation of non-Gaussian states of light

Year: 2014

Authors: Gagatsos C.N., Fiurasek J., Zavatta A., Bellini M., Cerf N.J.

Autors Affiliation: Quantum Information and Communication, Ecole Polytechnique de Bruxelles, Universit√© Libre de Bruxelles, 1050 Brussels, Belgium; Department of Optics, Palack√Ĺ University, 17. listopadu 1192/12, CZ-771 46 Olomouc, Czech Republic; Istituto Nazionale di Ottica, INO-CNR, Largo Enrico Fermi, 6, I-50125 Firenze, Italy; Department of Physics, LENS, University of Firenze, 50019 Sesto Fiorentino, Firenze, Italy

Abstract: We examine the behavior of non-Gaussian states of light under the action of probabilistic noiseless amplification and attenuation. Surprisingly, we find that the mean-field amplitude may decrease in the process of noiseless amplification-or may increase in the process of noiseless attenuation, a counterintuitive effect that Gaussian states cannot exhibit. This striking phenomenon could be tested with experimentally accessible non-Gaussian states, such as single-photon added coherent states. We propose an experimental scheme, which is robust with respect to the major experimental imperfections, such as inefficient single-photon detection and imperfect photon addition. In particular, we argue that the observation of mean-field amplification by noiseless attenuation should be feasible with current technology.

Journal/Review: PHYSICAL REVIEW A

Volume: 89 (6)      Pages from: 062311  to: 062311

More Information: C.N.G. acknowledges financial support from Wallonia-Brussels International via the Excellence Grants program and gratefully thanks the Department of Optics, Palacky University for the fruitful collaboration and hospitality during his visit in February 2013. This work was supported by the F.R.S.-FNRS under the ERA-NET CHIST-ERA project HIPERCOM, by the Belgian Federal IAP program under Project No. P7/35 Photonics@be, and by the European Social Fund and Czech Ministry of Education under Project No. EE2.3.20.0060 of Operational Program Education for Competitiveness. J.F. acknowledges support by the Czech Science Foundation (Project No. P205/12/0577). M. B. and A.Z. acknowledge support from the EU under ERA-NET CHIST-ERA project QSCALE.
KeyWords: Particle beams; Photons, Current technology; Experimental imperfections; Experimental scheme; Gaussian state; Noiseless amplifications; Non-Gaussian state; Photon additions; Single photon detection, Gaussian noise (electronic)
DOI: 10.1103/PhysRevA.89.062311

Citations: 8
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