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Open Quantum Systems Decoherence Quantum Simulation Topological Quantum Computing

Topological invariants for SPT entanglers

arXiv
Authors: Carolyn Zhang

Year

2022

Paper ID

58655

Status

Preprint

Abstract Read

~2 min

Abstract Words

84

Citations

N/A

Abstract

We develop a framework for classifying locality preserving unitaries (LPUs) with internal, unitary symmetries in d dimensions, based on (d-1) dimensional "flux insertion operators" which are easily computed from the unitary. Using this framework, we obtain formulas for topological invariants of LPUs that prepare, or entangle, symmetry protected topological phases (SPTs). These formulas serve as edge invariants for Floquet topological phases in (d+1) dimensions that "pump" d-dimensional SPTs. For 1D SPT entanglers and certain higher dimensional SPT entanglers, our formulas are completely closed-form.

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  • We develop a framework for classifying locality preserving unitaries (LPUs) with internal, unitary symmetries in d dimensions, based on (d-1) dimensional "flux insertion...

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