Generation of massive cluster states by quantum correlation control among frequency modes of frequency comb

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K13385
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Optical engineering, Photon science
• Research Institution: Keio University
• Principal Investigator: Kannari Fumihiko 慶應義塾大学, 理工学部(矢上), 教授 (40204804)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 量子光学 / スクイーズド光 / 広帯域光 / 周波域量子相関 / 適応制御

Outline of Final Research Achievements

When utilizing ultrafast nonlinear optics such as four-wave mixing in a fiber, we can generate quantum correlation among frequency modes of a laser pulse propagating through the fiber.
First, we constructed a multimode quantum theory of nonlinear propagation in optical fibers, where we can extract orthogonal eigenfunctions from a broad spectrum. Using this theory, we proved that higher photon-number density squeezing can be obtained up to much higher eigenmodes via nonlinear pulse propagation.
Furthermore, we demonstrated that four-mode cluster states in any combinations can be generated among the frequency modes in a laser pulse propagating through a fiber when the initial spectral phase are adaptively shaped.

Free Research Field

超高速レーザー光学および量子光学