International Journal of Physics

International Journal of Physics | Vol. 13, No. 8, August 2022 | pp. 57–64

DOI: 10.46882/2022/IJP/000148

Research Article

Title: Quantum Entanglement Kinetics and Decoherence Controls in Driven Asymmetric Quantum Dot Chains

Names of Authors: S. H. Zhang¹, J. W. Park²

Authors’ Affiliations:
¹ Department of Physics, Tsinghua University, Beijing, China
² Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon, South Korea

Abstract: Protecting non-classical quantum state correlations from localized environmental fluctuations is a major roadblock to scaling high-fidelity solid-state quantum computation networks. This paper investigates the time-dependent kinetic evolution of quantum entanglement and presents active decoherence control strategies within driven asymmetric quantum dot chains. The model comprises a multi-level semiconductor double-quantum-dot array embedded in an optical microcavity and interacting with a discrete thermal acoustic phonon bath. We solved the density matrix master equations using an algebraic operator framework matching the Lindblad dissipation rules at a cryogenic operating temperature of 4.2 K. The calculations demonstrate that modulating the external laser fields to satisfy multi-photon resonance profiles effectively shelters the electronic states from radiative cavity mirror leaks. This isolation sustains stable bipartite entanglement across continuous runtime blocks exceeding 22.0 ns, preserving a concurrence index above 0.84. We simulated a periodic dynamical phase-reversal pulse sequence that dampens low-frequency charge noise channels. This optimization yields a target quantum phase gate fidelity calculation of 99.3% ± 0.2%. These structural and kinetic parameters assist engineers in configuring stable, noise-immune registers.

Keywords: Quantum entanglement; quantum dots; Lindblad master equation; dynamical decoupling; cavity electrodynamics; quantum computing

Manuscript Timeline: Received: May 12, 2022; Revised: July 03, 2022; Accepted: July 25, 2022; Published: August 16, 2022

Citation: Zhang, S. H., & Park, J. W. (2022). Quantum Entanglement Kinetics and Decoherence Controls in Driven Asymmetric Quantum Dot Chains. International Journal of Physics, 13(8), 57–64.

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