Effect of the detector efficiency on the phase sensitivity in a Mach-Zehnder interferometer

Autor:	Goodong Park, Chung Ki Hong, Jongtae Shin, Kisik Kim, Heonoh Kim, Taesoo Kim, Tae-Gon Noh, Yang Ha
Rok vydání:	1999
Předmět:	Physics Physics::Instrumentation and Detectors business.industry Quantum limit Detector Beat (acoustics) Mach–Zehnder interferometer Atomic and Molecular Physics and Optics Classical limit Optics Fock state High Energy Physics::Experiment Heisenberg limit business Quantum
Zdroj:	Physical Review A. 60:708-711
ISSN:	1094-1622 1050-2947
DOI:	10.1103/physreva.60.708
Popis:	The effect of quantum efficiencies of detectors on the phase sensitivity of a Mach-Zehnder is analyzed for the Fock state input. The phase uncertainty of two different interference experiments, the second order and the fourth order, are compared with two practical detectors with less than unit quantum efficiencies. It is found out that in the second-order interference experiment we cannot beat the classical limit in the phase sensitivity, even with ideal detectors. We show that almost ideal detectors are required to get the Heisenberg limit in the phase sensitivity of the fourth-order interference for two Fock state light inputs. There exists an optimum angle given by the efficiency of the detectors.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b0280ad1f26ff6453760ffc641a5c8e5 https://doi.org/10.1103/physreva.60.708 Zobrazit plný text záznamu