| Autor: |
Zangi, Sultan Mahmood, Rahman, Atta ur, Ji, ZhaoXu, Ai, Hazrat, Zhang, HuanGuo |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Zangi, S. M., Ji, Z. X., Ali, H., & Zhang, H. G. (2022). Decoherence Effects in a Three-Level System under Gaussian Process. Symmetry, 14(12), 2480 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.3390/sym14122480 |
| Popis: |
When subjected to a classical fluctuating field characterized by a Gaussian process, we examine the {purity} and coherence protection in a three-level quantum system. This symmetry of the three-level system is examined when the local random field is investigated further in the noiseless and noisy regimes. In~particular, we consider fractional Gaussian, Gaussian, Ornstein--Uhlenbeck, and~power law noisy regimes. We show that the destructive nature of the Ornstein--Uhlenbeck noise toward the symmetry of the qutrit to preserve encoded {purity and coherence} remains large. Our findings suggest that properly adjusting the noisy parameters to specifically provided values can facilitate optimal extended {purity and coherence} survival. Non-vanishing terms appear in the final density matrix of the single qutrit system, indicating that it is in a strong coherence regime. Because~of all of the Gaussian noises, monotonic decay with no revivals has been observed in the single qutrit system. In~terms of coherence and information preservation, we find that the current qutrit system outperforms systems with multiple qubits or qutrits using purity and von Neumann entropy. A~comparison of noisy and noiseless situations shows that the fluctuating nature of the local random fields is ultimately lost when influenced using the classical Gaussian noises |
| Databáze: |
arXiv |
| Externí odkaz: |
|
