Non-Markovian Dynamics of Geometric Quantum Discord in a Double Quantum Dot System

Abstract

In this paper, we study the geometric quantum discord dynamics of the double quantum dot charge qubit in the non-Markovian environment. We apply the non-perturbative non-Markovian quantum state diffusion method to obtain the exact master equation of the double quantum dot system coupled to two independent non-zero temperature electronic baths. Then, we use this master equation to investigate the effects of non-Markovianity, inter-dot coupling strength and bath temperature on the dynamics of geometric quantum discord. Our studies show that the geometric quantum discord of a double quantum dot system can be modified and enhanced in some cases via these factors.

Effect of Induced Transition on the Quantum Entanglement and Coherence in Two‐Coupled Double Quantum Dot System

“…[49,57,58] In the scenario of DQDs, these connections between quantum coherence and other quantum resources have received considerable attention. [29,[59][60][61][62][63][64][65] In this regard, this work studies the effect of an external stimulus on the quantum aspects of thermal coherence and entanglement in a two-coupled DQDs system. The external stimulus is characterized by the transition frequency of the electrons between the left and right dots.…”

“…[ 49,57,58 ] In the scenario of DQDs, these connections between quantum coherence and other quantum resources have received considerable attention. [ 29,59–65 ]…”

Effect of induced transition on the quantum entanglement and coherence in two-coupled double quantum dots system

“…The link between quantum coherence and correlations is discussed in references 40, 48, and 49. In the scenario of DQDs, these connections between quantum coherence and other quantum resources have received considerable attention [23,[50][51][52][53].…”