Effective dynamics of qubit networks via phase-covariant quantum ensembles
- URL: http://arxiv.org/abs/2404.15223v1
- Date: Tue, 23 Apr 2024 16:54:26 GMT
- Title: Effective dynamics of qubit networks via phase-covariant quantum ensembles
- Authors: Sean Prudhoe, Unnati Akhouri, Tommy Chin, Sarah Shandera,
- Abstract summary: We study ensembles of phase-covariant channels.
We show that such ensembles arise naturally from familiar spin-chain models.
We show that the disorder-averaged map of disordered spin chains is phase-covariant under a weak symmetry constraint on the distribution.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We study ensembles of phase-covariant channels. We show that such ensembles arise naturally from familiar spin-chain models (e.g., XXZ) with a special class of initial states, and that the disorder-averaged map of disordered spin chains is phase-covariant under a weak symmetry constraint on the distribution. We use those examples to motivate a broader class of phase-covariant ensembles, which include both unital and non-unital channels. We demonstrate the physical properties captured by the late-time limit of the average map over the ensemble.
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