International Journal of Physics

International Journal of Physics | Vol. 11, No. 9, September 2020 | pp. 65–72

DOI: 10.46882/2020/IJP/000125

Research Article

Title: Quantum Entanglement Kinetics and Phase Decoupling in Driven Hybrid Quantum-Dot Cavity Systems

Names of Authors: S. H. Zhang¹, M. S. Al-Rashid²

Authors’ Affiliations:
¹ Department of Physics, Tsinghua University, Beijing, China
² Department of Physics, King Abdulaziz University, Jeddah, Saudi Arabia

Abstract: Preserving non-classical correlations against localized environmental fluctuations is a primary operational objective in developing high-fidelity solid-state quantum computation arrays. This paper investigates the time-dependent kinetic evolution of quantum entanglement and presents active phase decoupling strategies within driven hybrid quantum-dot cavity systems. The model comprises a multi-level semiconductor quantum dot embedded in a microdiscoid resonator 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 condition 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 20.0 ns, preserving a concurrence index above 0.85. 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 99.4% ± 0.2%. These structural and kinetic parameters assist engineers in configuring stable, noise-immune solid-state registers for distributed quantum data networks.

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

Manuscript Timeline: Received: May 14, 2020; Revised: July 08, 2020; Accepted: August 03, 2020; Published: September 10, 2020

Citation: Zhang, S. H., & Al-Rashid, M. S. (2020). Quantum Entanglement Kinetics and Phase Decoupling in Driven Hybrid Quantum-Dot Cavity Systems. International Journal of Physics, 11(9), 65–72.

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