Related papers: Perfect State Transfer of Mixed States and Purification in Central Spin Systems

Perfect State Transfer of Mixed States and Purification in Central Spin Systems

URL: http://arxiv.org/abs/2508.12515v1
Date: Sun, 17 Aug 2025 22:38:24 GMT
Title: Perfect State Transfer of Mixed States and Purification in Central Spin Systems
Authors: Matthew Wampler, Nigel R. Cooper,
Abstract summary: We show how two many-body, generally mixed, quantum states can be swapped via collective, all-to-all interactions.<n>We present an experimentally relevant implementation for quantum dots that enables coherent exchange of quantum information between different species of nuclear spins.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: We show how two many-body, generally mixed, quantum states can be swapped via collective, all-to-all interactions. Specifically, we present an experimentally relevant implementation for quantum dots that enables coherent exchange of quantum information between different species of nuclear spins, effectively achieving a perfect swap gate for qudits formed from these different species. This process also serves as a tool for nuclear spin purification. The results are obtained by mapping the problem onto perfect state transfer on a 1D chain. In the partially polarized limit, we demonstrate that the states can be exchanged independently of the initial state. We also assess the robustness of the procedure to decoherence and errors.

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