Control of conditional quantum beats in cavity QED: amplitude decoherence and phase shifts

被引：9

作者：

Cimmarusti, A. D. ^{[1
,2
]}

Schroeder, C. A. ^{[1
,2
]}

Patterson, B. D. ^{[1
,2
]}

Orozco, L. A. ^{[1
,2
]}

Barberis-Blostein, P. ^{[3
]}

Carmichael, H. J. ^{[4
]}

机构：

[1] Univ Maryland, Dept Phys, Joint Quantum Inst, College Pk, MD 20742 USA

[2] NIST, College Pk, MD 20742 USA

[3] Univ Nacl Autonoma Mexico, Inst Invest Matemat Aplicadas & Sistemas, Mexico City 04510, DF, Mexico

[4] Univ Auckland, Dept Phys, Auckland, New Zealand

来源：

NEW JOURNAL OF PHYSICS | 2013年 / 15卷

基金：

美国国家科学基金会;

关键词：

ERASER;

D O I：

10.1088/1367-2630/15/1/013017

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We implement a simple feedback mechanism on a two-mode cavity QED system to preserve the Zeeman coherence of a ground state superposition that generates quantum beats on the second-order correlation function. Our investigation includes theoretical and experimental studies that show how to prevent a shift away from the Larmor frequency and associated decoherence caused by Rayleigh scattering. The protocol consists of turning off the drive of the system after the detection of a first photon and letting it evolve in the dark. Turning the drive back on after a pre-set time reveals a phase accumulated only from Larmor precession, with the amplitude of the quantum beat more than a factor of two larger than with continuous drive.

引用

页数：15

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