Observation of macroscopic quantum state using cryogenic oscilator

2016 Fiscal Year Final Research Report

• Project/Area Number: 26600110
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Optical engineering, Photon science
• Research Institution: The University of Tokyo
• Principal Investigator: Ando Masaki 東京大学, 大学院理学系研究科(理学部), 准教授 (90313197)
• Research Collaborator: MATSUMOTO Nobuyuki ; KOMORI Kentaro ; MICHIMURA Yuta
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 量子雑音

Outline of Final Research Achievements

The purpose of this research is to investigate quantum behavior in a macroscopic scale. In a microscopic scale, like a scale of atom or molecule, quantum mechanics can be used to describe physics. In the other hand, it is not valid in a macroscopic scale any more. The transition from micro to macro may be a key issue for expansion of quantum mechanics.
As a result of this research, we made achievements in two topics. One is a development of a remote cooling scheme. In a small mirror, we cannot attach an actuator on it. So we actuate the mirror by optical spring (radiation pressure) of a laser beam. Another achievement is detailed design of experimental setup for direct measurement of quantum radiation pressure noise of a laser beam, using a small torsion pendulum. We already started the assembly of the setup.

Free Research Field

重力波物理学