超電導磁束量子ビットによる巨視的量子限界の探索 <学位論文要旨>

The search for macroscopic quantum limit by superconducting flux qubit <Summaries of the Doctoral Theses>

藤井 敏之

広島大学大学院総合科学研究科紀要. II, 環境科学研究

Bulletin of the Graduate School of Integrated Arts and Sciences, Hiroshima University. II, Studies in environmental sciences

Quantum mechanics has predicted many counterintuitive phenomena in daily life, and has changed our view of the world. Among such predictions, the existence of a macroscopic object in superposition is especially unbelievable. As Einstein asked, "Do you really believe that the moon exists only when you look at it?". However, recent experimental results on a mesoscopic scale will ultimately require us to dismiss commonsense so-called macroscopic reality.

Leggett and Garg applied the Bell scheme for testing local realism to the time evolution of a macroscopic two-state system, and proposed a temporal version of the Bell inequality (the Leggett-Garg (LG) inequality) for testing macroscopic realism. However, as with the Bell inequality, the statistical approach behind this scheme may be less effective in showing clear incompatibility.

Here we propose a temporal version of the Greenberger-Horne-Zeilinger (GHZ) scheme without statistical treatment for testing Einstein's moon using three-time correlations.

物理学 [ 420 ]

日本語

広島大学大学院総合科学研究科

Copyright (c) 2010 Graduate School of Integrated Arts and Sciences, Hiroshima University. All rights reserved.

[ISSN] 1881-7696

[NCID] AA12198658