International Journal of Physics | Vol. 9, No. 10, October 2018 | pp. 73–80
DOI: 10.46882/2018/IJP/000102
Research Article
Title: Quantum Entanglement Kinetics and Decoherence Protections in Coupled Four-Level Quantum Well Arrays
Names of Authors: S. H. Zhang¹, J. W. Park²
Authors’ Affiliations: ¹Department of Physics, Tsinghua University, Beijing, China; ²Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon, South Korea
Abstract: Preserving quantum correlations against environmental noise is a major bottleneck in developing scalable solid-state quantum memory computing architectures. This paper investigates the time-dependent evolution of quantum entanglement and evaluates active decoherence control strategies within coupled semiconductor four-level quantum well arrays. The system models a double-quantum-well structure coupled to an optical microcavity interacting with a localized acoustic phonon bath. We utilized the density matrix master equation framework within the Lindblad dissipation model at an operating temperature of 4.2 K. Our numerical calculations show that configuring the driving laser fields under tunneling-induced transparency conditions effectively decouples the electronic state from the cavity decay channel. This decoupling preserves bipartite entanglement for durations exceeding 22.0 ns, maintaining a concurrence value above 0.86. We simulated an active dynamical decoupling pulse sequence that suppresses phase relaxation caused by low-frequency charge noise. The optimized sequence yielded a quantum gate operation fidelity of 99.4% ± 0.2%. These findings provide an effective theoretical framework for designing noise-resistant quantum memory registers and stabilizing non-classical states within solid-state circuits.
Keywords: Quantum entanglement; decoherence; quantum wells; Lindblad master equation; dynamical decoupling; tunneling-induced transparency
Manuscript Timeline: Received: June 02, 2018; Revised: July 29, 2018; Accepted: August 25, 2018; Published: October 10, 2018
Citation: Zhang, S. H., & Park, J. W. (2018). Quantum Entanglement Kinetics and Decoherence Protections in Coupled Four-Level Quantum Well Arrays. International Journal of Physics, 9(10), 73–80.
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