Optimal cloning of coherent states with a linear amplifier and beam splitters

Authors
Braunstein, SL Cerf, NJ Iblisdir, S van Loock, P Massar, S
Citation
Sl. Braunstein et al., Optimal cloning of coherent states with a linear amplifier and beam splitters, PHYS REV L, 86(21), 2001, pp. 4938-4941
Citations number
23
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
86
Issue
21
Year of publication
2001
Pages
4938 - 4941
Database
ISI
SICI code
0031-9007(20010521)86:21<4938:OCOCSW>2.0.ZU;2-E
Abstract
A transformation achieving the optimal symmetric N --> M cloning of coheren t states is presented. Its implementation requires only a phase-insensitive linear amplifier and a network of beam splitters. An experimental demonstr ation of this continuous-variable cloner should therefore he in tile scope of current technology. The link between optimal quantum cloning and optimal amplification of quantum states is also pointed out.