Optimal control of quantum revival

Abstract

Increasing fidelity is the ultimate challenge of quantum information technology. In addition to decoherence and dissipation, fidelity is affected by internal imperfections such as impurities in the system. Here we show that the quality of quantum revival, i.e., periodic recurrence in the time evolution, can be restored almost completely by coupling the distorted system to an external field obtained from quantum optimal control theory. We demonstrate the procedure with wave-packet calculations in both one- and two-dimensional quantum wells, and analyze the required physical characteristics of the control field. Our results generally show that the inherent dynamics of a quantum system can be idealized at an extremely low cost.

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Cited by in corpus (5)

• Real-space density functional theory on graphical processing units: computational approach and comparison to Gaussian basis set methods
• Exploring Quantum Control Landscape Structure
• Exploring the complexity of quantum control optimization trajectories
• Quantum revivals of non Rabi type in Jaynes-Cummings model
• Quantum birthmarks: Ergodicity breaking beyond scarring