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quant-ph2025
Fundamental Costs of Noise-Robust Quantum Control: Speed Limits and Complexity
Junkai Zeng, Xiu-Hao Deng
Noise is ubiquitous in quantum systems and is a major obstacle for the advancement of quantum information science. Noise-robust quantum control achieves high-fidelity operations by…
quant-ph2025
Non-Perturbative Geometric Framework for Single-Qubit Gates under Always-On Couplings
Junkai Zeng, Lin Chen, Xiu-Hao Deng
In qubit arrays with always-on couplings, single-qubit gates pose a control challenge often as demanding as entangling operations. The same interactions that enable two-qubit entan…