Coopmans, L. and Dooley, S. and Jubb, I. and Kavanagh, K. and Kells, Graham (2021) Dynamical phase error in interacting topological quantum memories. Physical Review Research, 3 (3). ISSN 2643-1564

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Abstract

A local Hamiltonian with topological quantum order (TQO) has a robust ground-state degeneracy that makes it an excellent quantum memory candidate. This memory can be corrupted however if part of the state leaves the protected ground-state manifold and returns later with a dynamically accrued phase error. Here we analyze how TQO suppresses this process and use this to quantify the degree to which spectral densities in different topological sectors are correlated. We provide numerical verification of our results by modeling an interacting p-wave superconducting wire.

Item Type:	Article
Keywords:	Dynamical phase error; interacting topological quantum memories;
Academic Unit:	Faculty of Science and Engineering > Theoretical Physics
Item ID:	18420
Identification Number:	https://doi.org/10.1103/PhysRevResearch.3.033105
Depositing User:	Graham Kells
Date Deposited:	23 Apr 2024 15:28
Journal or Publication Title:	Physical Review Research
Publisher:	American Physical Society
Refereed:	Yes
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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