Author

Sovik Roy

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Open access Feb 2026

Phase-sensitive framed-ribbon representation of single-qubit Pauli measurements in linear cluster states

We provide an explicit geometric classification of single-qubit projective measurements on one-dimensional (1D) linear cluster states (LCS) within a topological framework. By establishing an explicit geometrical correspondence between local measurements and topological surgery operations on an associated link model i.e...

Sougata Bhattacharyya, Sovik Roy · Physica Scripta · 1 citation

Preprint Aug 2026

Geometry versus excitation sector in the decoherence of asymmetric $N$-qubit $W$ states

We investigate how network geometry and excitation sector separately control pairwise entanglement decay in asymmetric multipartite $W$ states. To disentangle these effects, we introduce an analytically tractable $N$-qubit generalization of the asymmetric Lohmayer geometry and its complementary-excitation partner, yiel...

Sougata Bhattacharyya, Sovik Roy, Fatih Ozaydin · 0 citations

Preprint Aug 2026

Knot your average qutrit: Measurement-induced entanglement splitting and the cabling dictionary for GHZ and W States

Multipartite entanglement is conventionally classified by state families viz. family of GHZ and W class of states, with each family expected to behave differently under measurement. We show that, at least for the question of how entanglement splits after a single-particle measurement, this is not the division that matt...

Sougata Bhattacharyya, Sovik Roy · 0 citations