Adaptable Route to Fast Coherent State Transport via Bang-Bang-Bang Protocols
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866913058700394496 |
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| author | Yu, Ya-Tang Lee, Hsin-Lien Hsu, Ting Lin, Guin-Dar Chen, Ying-Cheng Jen, H. H. |
| author_facet | Yu, Ya-Tang Lee, Hsin-Lien Hsu, Ting Lin, Guin-Dar Chen, Ying-Cheng Jen, H. H. |
| contents | 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 (BBB) protocol, utilizing a combination of forwardand backward-moving trap potentials, to expedite the coherent state transport. This protocol approaches the quantum speed limit under a harmonic trap potential, surpassing the performance by the forward-moving-only potential protocols. 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_20026 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Adaptable Route to Fast Coherent State Transport via Bang-Bang-Bang Protocols Yu, Ya-Tang Lee, Hsin-Lien Hsu, Ting Lin, Guin-Dar Chen, Ying-Cheng Jen, H. H. Quantum Physics 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 (BBB) protocol, utilizing a combination of forwardand backward-moving trap potentials, to expedite the coherent state transport. This protocol approaches the quantum speed limit under a harmonic trap potential, surpassing the performance by the forward-moving-only potential protocols. 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. |
| title | Adaptable Route to Fast Coherent State Transport via Bang-Bang-Bang Protocols |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2511.20026 |