Restoring of quantum state transferred along XY-spin chain and entanglement evolution

• URL: http://arxiv.org/abs/2504.15832v1
• Date: Tue, 22 Apr 2025 12:25:01 GMT
• Title: Restoring of quantum state transferred along XY-spin chain and entanglement evolution
• Authors: N. A. Tashkeev, A. I. Zenchuk,
• Abstract summary: We propose a protocol restoring the state transferred along the spin chain governed by the XY-Hamiltonian.<n>Restoring is established via the special unitary transformation applied to the receiver side of the chain.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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.

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