Quantum nondemolition measurement with a nonclassical meter input and an electro-optic enhancement

Date

2002

Authors

Andersen, U.
Buchler, Benjamin
Bachor, Hans
Lam, Ping Koy

Journal Title

Journal ISSN

Volume Title

Publisher

Institute of Physics Publishing

Abstract

Optical quantum nondemolition measurements are performed using a beamsplitter with a nonclassical meter input and a electro-optic feedforward loop. The nonclassical meter input is provided by a stable 4.5 dB amplitude squeezed source generated by an optical parametric amplifier. We show that the implementation of a feedforward loop gives a substantial improvement in the signal transfer efficiency. With a 92% reflective beamsplitter we measure a transfer coefficient of Ts+m = 1.81. The quantum state preparation ability of our system is evaluated using two-dimensional correlation plots. This technique allows the direct visualization of the quantum correlations between the outputs of the QND system.

Description

Keywords

Electrooptical effects, Optical correlation, Optical parametric oscillators, Visualization, Correlation plots, Quantum nondemolition measurement, Squeezed states, Quantum optics Correlation plots, Quantum nondemolition measurements, Squeezed states

Citation

Source

Journal of Optics B: Quantum and Semiclassical Optics

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1088/1464-4266/4/3/380

Restricted until

2037-12-31