Altmetric

Quantum dynamics of a driven two-level molecule with variable dephasing

File Description SizeFormat 
Grandi Quantum dynamics.pdfPublished version627.89 kBAdobe PDFDownload
Title: Quantum dynamics of a driven two-level molecule with variable dephasing
Author(s): Grandi, S
Major, K
Polisseni, C
Boissier, S
Clark, A
Hinds, EA
Item Type: Journal Article
Abstract: The longitudinal (Γ₁) and transverse (Γ₂) decay rates of a two-level quantum system have profound influence on its evolution. Atomic systems with Γ₂=½Γ₁ have been studied extensively, but with the rise of solid-state quantum devices it is also important to consider the effect of stronger transverse relaxation due to interactions with the solid environment. Here we study the quantum dynamics of a single organic dye molecule driven by a laser. We measure the variation of Γ₂ with temperature and determine the activation energy for thermal dephasing of the optical dipole. Then we measure the second-order correlation function g⁽²⁾(τ) of the light emitted by the molecule for various ratios Γ₂/Γ₁ and saturation parameters S. We show that the general solution to the optical Bloch equations accurately describes the observed quantum dynamics over a wide range of these parameters, and we discuss the limitations of the various approximate expressions for g⁽²⁾(τ) that appear in the literature.
Publication Date: 19-Dec-2016
Date of Acceptance: 14-Nov-2016
URI: http://hdl.handle.net/10044/1/42773
DOI: http://dx.doi.org/10.1103/PhysRevA.94.063839
ISSN: 1094-1622
Publisher: American Physical Society
Journal / Book Title: Physical Review A
Volume: 94
Issue: 6
Copyright Statement: © 2016 The Authors.Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/). Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Keywords: General Physics
02 Physical Sciences
01 Mathematical Sciences
03 Chemical Sciences
Publication Status: Published
Article Number: 063839
Appears in Collections:Quantum Optics and Laser Science
Physics
Faculty of Natural Sciences



Items in Spiral are protected by copyright, with all rights reserved, unless otherwise indicated.

Creative Commons