Violation of Leggett—Garg inequalities for quantum-classical hybrids

7th International Workshop DICE2014 Spacetime – Matter – Quantum Mechanics

物理学;力学

Lobejko, Marcin^1 ; Dajka, Jerzy^1,2

Institute of Physics, University of Silesia, Katowice, Poland^1

Silesian Center for Education and Interdisciplinary Research, University of Silesia, Chorzów, Poland^2

关键词: Hybrid behavior;    J value;    Quantum system;    Quantum-classical;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/626/1/012038/pdf
DOI  :  10.1088/1742-6596/626/1/012038

学科分类：力学，机械学

来源: IOP

【 摘 要 】

Violation of Leggett-Garg inequalities can serve as a signature of a failure of (macroscopic) realism. We investigate violation of the simplest Leggett-Garg inequality for a qubit coupled to an integer j spin (angular momentum). Such a system effectively reveals quantum-classical hybrid behavior in the limit of large j values. We show that a maximal violation of the Leggett- Garg inequality is larger for quantum-classical hybrids than for fully quantum systems.