Feedforward-assisted coherent-state comparison amplifier

Autor:	M. Bathaee, N. Marjan, Alireza Bahrampour
Rok vydání:	2019
Předmět:	Nondeterministic algorithm Physics Photon High fidelity Amplifier media_common.quotation_subject Feed forward Electronic engineering Fidelity Coherent states Schematic media_common
Zdroj:	Physical Review A. 100
ISSN:	2469-9934 2469-9926
DOI:	10.1103/physreva.100.043809
Popis:	Quantum optical coherent-state comparison amplifiers are nondeterministic devices which can amplify rather noiselessly a weak coherent state with an unknown phase from a finite discrete set. The high fidelity and high success probability of this amplifier are accomplished by a comparison stage and some photon subtraction stages. Due to the heralding nature of these amplifiers, they work part of the time. Here, we propose a feedforward protocol to increase the heralded times by correcting the incorrect guess. Hence, we enhance the fidelity and success probability more. Finally, the schematic experimental configuration of the feedforward-assisted coherent-state comparison amplifier is proposed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1a04600553483002056847d4ebfa2cb7 https://doi.org/10.1103/physreva.100.043809 Zobrazit plný text záznamu