Mendoza-Arenas J J, Gómez-Ruiz F J, Rodríguez F J, Quiroga L
Departamento de Física, Universidad de los Andes, A.A. 4976, Bogotá, D. C., Colombia.
Donostia International Physics Center, E-20018, San Sebastián, Spain.
Sci Rep. 2019 Nov 28;9(1):17772. doi: 10.1038/s41598-019-54121-1.
We identify different schemes to enhance the violation of Leggett-Garg inequalities in open many-body systems. Considering a nonequilibrium archetypical setup of quantum transport, we show that particle interactions control the direction and amplitude of maximal violation, and that in the strongly-interacting and strongly-driven regime bulk dephasing enhances the violation. Through an analytical study of a minimal model we unravel the basic ingredients to explain this decoherence-enhanced quantumness, illustrating that such an effect emerges in a wide variety of systems.
我们确定了不同的方案，以增强开放多体系统中对莱格特-加尔格不等式的违背。考虑到量子输运的非平衡典型设置，我们表明粒子相互作用控制着最大违背的方向和幅度，并且在强相互作用和强驱动 regime 中，体退相干增强了这种违背。通过对一个最小模型的分析研究，我们揭示了解释这种退相干增强量子性的基本要素，表明这种效应在各种各样的系统中都会出现。
