Multiphoton interference between squeezed state and coherent state

2016 Fiscal Year Final Research Report

• Project/Area Number: 26390078
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Optical engineering, Photon science
• Research Institution: The University of Electro-Communications
• Principal Investigator: Zhang Yun 電気通信大学, 大学院情報理工学研究科, 准教授 (00508830)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: squeezed light / quantum interference / cohenrent state

Outline of Final Research Achievements

We present a technique for generation of tripartite quantum-correlated amplitude-squeezed light beams, using frequency doubling in a singly resonant cavity with two output ports.This opens an alternate way to produce tripartite-quantum-correlated systems. One the ohter hand, We also experimentally show a quantum interference in phase space by interrogating photon number probabilities (n=2, 3, and 4) of a displaced squeezed state, which is generated by an optical parametric amplifier and whose displacement is controlled by amplitude of injected coherent light. It is found that the probabilities exhibit oscillations of interference effect depending upon the amplitude of the controlling light field. This phenomenon is attributed to quantum interference in phase space and indicates the capability of controlling quantum interference using amplitude. This remarkably contrasts with the oscillations of interference effects being usually controlled by relative phase in classical optics.

Free Research Field

量子光学