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Physical Review A

Topologically protected state transfer beyond single excitation and its acceleration via shortcut to adiabaticity

Anonymous, Biao Xiong, Jin Yang, Hao Zhao, Jibing Liu, Chuan-Jia Shan

Published Sep 4, 2026• 0 citations
Publisher
DOI
10.1103/nkrg-bmpp

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Interference-engineered shortcut to perfect state transfer

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Achieving fast, high-fidelity state transfer is fundamental to scalable integrated photonics and quantum information processing. While adiabatic evolution provides inherent robustness against control and fabrication imperfections, its requirement for slow driving leads to impractically long propagation distances in photonic circuits. Existing acceleration strategies, such as shortcuts to adiabaticity (STA), can dramatically shorten evolution times but generally rely on non-native auxiliary couplings or delicate Hamiltonian engineering that are difficult to implement in practice. Here we introduce evolution-pause synthesis (EPS), an interference engineered shortcut protocol that achieves fast, near-perfect state transfer strictly within the native system Hamiltonian. It achieves this by treating transient excitations as coherent resources and canceling their accumulated amplitudes via strategically interleaved pauses. By decoupling relative dynamical phase accumulation from parameter variations, EPS steers open transition trajectories into a closed loop in complex amplitude space, enabling perfect state transfer without auxiliary fields or complex parameter detours. We demonstrate this mechanism in Landau-Zener dynamics and extend it to a multilevel STIRAP process, achieving an 11.8-fold acceleration over the adiabatic baseline. Further, we experimentally validate EPS on a silicon photonic platform, realizing high-fidelity state transfer in a $16\,μ\mathrm{m}$ footprint, a nearly tenfold reduction in device length compared with a $150\,μ\mathrm{m}$ adiabatic reference. EPS offers a general hardware-compatible framework for fast, practical coherent control across wave and quantum platforms.

physics.opticsCross-listedarXiv:2608.18794•Aug 20, 2026•0 citations
We demonstrate the use of shortcuts to adiabaticity protocols for initialization, read-out, and coherent control of dressed states generated by closed-contour, coherent driving of a single spin. Such dressed states have recently been shown to exhibit efficient coherence protection, beyond what their two-level counterparts can offer. Our state transfer protocols yield a transfer fidelity of ∼99.4(2)% while accelerating the transfer speed by a factor of 2.6 compared to the adiabatic approach. We show bidirectionality of the accelerated state transfer, which we employ for direct dressed state population read-out after coherent manipulation in the dressed state manifold. Our results enable direct and efficient access to coherence-protected dressed states of individual spins and thereby offer attractive avenues for applications in quantum information processing or quantum sensing.
We propose several schemes with diverse optional types of couplings to accelerate adiabatic topological quantum state transfers (QSTs) in optomechanical lattices (OMLs) by utilizing shortcut engineering, which hold significant promise for constructing topologically protected quantum networks. We first investigate the counterdiabatic (CD) schemes of shortcut to adiabatic topological QST in a small OML consisting of five sites. We show that a perfect QST can be achieved with either the full or the partial-CD terms, and the QST duration can be reduced to about one-tenth of that in the adiabatic version. To circumvent the next-nearest-neighbor couplings in the CD shortcut schemes, the detuning-induced transitionless-quantum-driving scheme is proposed and improved by incorporating the technique of soft quantum control, for which the auxiliary shortcut coupling becomes a nearest-neighbor hopping when considering a cyclic OML. We find that all shortcut schemes can maintain robustness of the adiabatic topological QST against disorders to a great extent, and more importantly, due to the much shorter duration, the shortcut schemes can guarantee a higher efficiency of QST when decay of the OML is taken into account. Finally, we expand the size of OML and propose a more general method by engineering an optimal coupling parameter to speed up the adiabatic topological QSTs, which can significantly shorten the QST duration, especially in large-scale OMLs.
Achieving fast, high-fidelity state transfer is fundamental to scalable integrated photonics and quantum information processing. While adiabatic evolution provides inherent robustness against control and fabrication imperfections, its requirement for slow driving leads to impractically long propagation distances in photonic circuits. Existing acceleration strategies, such as shortcuts to adiabaticity (STA), can dramatically shorten evolution times but generally rely on non-native auxiliary couplings or delicate Hamiltonian engineering that are difficult to implement in practice. Here we introduce evolution-pause synthesis (EPS), an interference engineered shortcut protocol that achieves fast, near-perfect state transfer strictly within the native system Hamiltonian. It achieves this by treating transient excitations as coherent resources and canceling their accumulated amplitudes via strategically interleaved pauses. By decoupling relative dynamical phase accumulation from parameter variations, EPS steers open transition trajectories into a closed loop in complex amplitude space, enabling perfect state transfer without auxiliary fields or complex parameter detours. We demonstrate this mechanism in Landau-Zener dynamics and extend it to a multilevel STIRAP process, achieving an 11.8-fold acceleration over the adiabatic baseline. Further, we experimentally validate EPS on a silicon photonic platform, realizing high-fidelity state transfer in a 16 μm16\,μ\mathrm{m}16μm footprint, a nearly tenfold reduction in device length compared with a 150 μm150\,μ\mathrm{m}150μm adiabatic reference. EPS offers a general hardware-compatible framework for fast, practical coherent control across wave and quantum platforms.