Author

Debashis Saha

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Preprint Oct 2026

Topology-independent quantum advantage in communication networks

Quantum communication can outperform classical communication in a variety of information-processing tasks, but such advantages are typically established for a fixed communication network. Here we introduce topology-independent quantum advantage, in which a quantum protocol outperforms every classical protocol subject t...

Ankush Pandit, V. N. S. Meghanath Ashtakala, Leon George Padayatty et al. · 0 citations

Preprint Oct 2026

Self-testing ideal quantum measurements

A fundamental prediction of quantum mechanics is that observables can be measured through ideal measurements, that is, measurements that give the same outcome when repeated and do not disturb any observable that is jointly measurable. In terms of quantum instruments, such an ideal measurement is described by projective...

Debashis Saha, Zhen-Peng Xu, Adán Cabello · 0 citations

Preprint Oct 2026

Nonlocality without entanglement for multipartite quantum measurements

We show that a pair of two-qubit product measurements can be perfectly distinguished when accessed jointly, yet cannot be perfectly distinguished when their local components are distributed between distant parties restricted to local quantum operations and classical communication (LOCC). This establishes a measurement...

Satyaki Manna, Debashis Saha · 0 citations