Abstract
The study maps generalized two-qubit Pauli operators to the generalized quadrangle W(2) and its Veldkamp space, identifying operator subsets corresponding to geometric hyperplanes along with newly recognized triadic and pentadic structures.
Given a remarkable representation of the generalized Pauli operators of two-qubits in terms of the points of the generalized quadrangle of order two, W(2), it is shown that specific subsets of these operators can also be associated with the points and lines of the four-dimensional projective space over the Galois field with two elements - the so-called Veldkamp space of W(2). An intriguing novelty is the recognition of (uni- and tri-centric) triads and specific pentads of the Pauli operators in addition to the "classical" subsets answering to geometric hyperplanes of W(2).
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