Entanglement-enhanced probing of a delicate material system

Author

Wolfgramm, F. ; Vitelli, C. ; Beduini, F.A. ; Godbout, N. ; Mitchell, M.W.

Author_Institution

ICFO-Inst. de Cienc. Fotoniques, Castelldefels, Spain

fYear

2013

fDate

9-14 June 2013

Firstpage

1

Lastpage

1

Abstract

Probing of delicate systems demands high sensitivity from limited probe energy. Quantum optical techniques to beat the standard quantum limit (SQL) offer a practical advantage for these measurements. Here we report the first entanglement-enhanced measurement of a delicate material system [1]. We non-destructively probe an atomic spin ensemble by near-resonant Faraday rotation, a measurement that is limited by probe-induced scattering in quantum memory and spin-squeezing applications [2]. We use narrowband, atom-resonant NooN states to beat the standard quantum limit of sensitivity, both on a per-photon and a per-damage basis.

Keywords

Faraday effect; atom-photon collisions; optical squeezing; quantum entanglement; SQL; atom-resonant NooN states; atomic spin ensemble; delicate material system; entanglement-enhanced measurement; entanglement-enhanced probing; limited probe energy; narrowband NooN states; near-resonant Faraday rotation; nondestructive probing; per-damage basis; per-photon basis; probe-induced scattering; quantum memory; quantum optical techniques; spin-squeezing applications; standard quantum limit; Atom optics; Atomic measurements; Integrated optics; Materials; Optical interferometry; Photonics; Sensitivity;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics (CLEO), 2013 Conference on

Conference_Location

San Jose, CA

Type

conf

Filename

6834148