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Projective virtual symmetry of a matrix product state
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Physics
Branch of physics
Quantum theory
Topological quantum matter
Symmetry-protected topological phase
Created
2026-09-24
Updated
2026-09-24
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An on-site
symmetry
of an injective MPS acts on virtual indices by
matrices
defined
up to
phase. Their projective
cohomology
class is the one-dimensional SPT invariant.
Ancestors
(6)
Symmetry-protected topological phase
Topological quantum matter
Quantum theory
Branch of physics
Physics
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Past exam of the mathematics course of the University of Cambridge
/
2026
/
iii
/
Paper 343
/
3
/
b
/
iii
/
Solution
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