Adaptable Route to Fast Coherent State Transport via Bang-Bang-Bang Protocols

Ya-Tang Yu, Hsin-Lien Lee, Ting Hsu, Guin-Dar Lin, Yin-Cheng Chen, HH Jen

出版日期

June 8, 2026

研究中心

離子阱實驗室

發表資訊

Phys. Rev. Lett. 136, 230802

內容目錄

Fast coherent state transport is essential to quantum computation and quantum information processing. While an adiabatic transport of atomic qubits guarantees a high fidelity of the state preparation, it requires a long timescale that defies efficient quantum operations. Here, we propose an adaptable and fast bang-bang-bang protocol, utilizing a combination of forward- and backward-moving trap potentials, to expedite the coherent state transport. We further showcase the advantage of applying squeezed coherent state evolution under a deeper potential followed by a weaker one, where a design of symmetric squeezing potential transports promotes an even shorter timescale for genuine state preparation. Our protocols outperform conventional forward-moving-only methods, providing new insights and opportunities for rapid state transport and preparation, ultimately advancing the capabilities of quantum control and quantum operations.