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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2504.15832 |
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| _version_ | 1866916702166450176 |
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| author | Tashkeev, N. A. Zenchuk, A. I. |
| author_facet | Tashkeev, N. A. Zenchuk, A. I. |
| contents | We propose a protocol restoring the state transferred along the spin chain governed by the XY-Hamiltonian. Such dynamics does not preserve the excitation number and leads to mixing multiple-quantum coherence matrices of orders having the same parities. Depending on the initial state, this results in
generating ether all possible or only even-order multiple-quantum coherence matrices. Restoring is established via the special unitary transformation applied to the receiver side of the chain (extended receiver). An example of restoring $\pm1$ and $\pm 2$-order coherence matrices in two-qubit state transfer is considered. Entanglement transfer in such process is also studied and possibility of its amplification is demonstrated. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_15832 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Restoring of quantum state transferred along XY-spin chain and entanglement evolution Tashkeev, N. A. Zenchuk, A. I. Quantum Physics We propose a protocol restoring the state transferred along the spin chain governed by the XY-Hamiltonian. Such dynamics does not preserve the excitation number and leads to mixing multiple-quantum coherence matrices of orders having the same parities. Depending on the initial state, this results in generating ether all possible or only even-order multiple-quantum coherence matrices. Restoring is established via the special unitary transformation applied to the receiver side of the chain (extended receiver). An example of restoring $\pm1$ and $\pm 2$-order coherence matrices in two-qubit state transfer is considered. Entanglement transfer in such process is also studied and possibility of its amplification is demonstrated. |
| title | Restoring of quantum state transferred along XY-spin chain and entanglement evolution |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2504.15832 |