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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
Preprint Aug 2026

Entangling capability of coherently controlled quantum processes

We analytically characterize entanglement generation by two paradigmatic coherently controlled quantum processes, the quantum switch and time-flip. Retaining rather than measuring or discarding the control, we treat the control and target as the bipartite system and assume pure product inputs, so that any output entang...

Beyza Aslanbaş, Bedirhan Alkan, G. Karpat · 1 citation
Preprint Sep 2026

Classical Capacity and Entanglement Cost of the Amplitude Damping Channel

Determining a noisy quantum channel's classical capacity and entanglement cost generally requires regularization over many channel uses. We remove both regularizations for every qubit-to-qubit channel admitting a pure output. For each such channel, Holevo information, channel entanglement of formation, and parallel ent...

Ziao Tang, Cheng-Kai Zhu, Ge Bai et al. · 1 citation
Preprint Sep 2026

Universal quantum coding

Entanglement distillation from noisy bipartite states and reliable quantum communication over noisy channels are fundamental tasks in quantum information theory, yet optimal coding schemes typically rely on prior knowledge of the underlying state or channel. Here, through Schur-Weyl duality, we establish a universal qu...

Jacopo Rizzo, Ludovico Lami, Jens Eisert et al. · 0 citations
Open access Mar 2026

Self-testing of mutually anticommuting observables and maximally entangled two-qudits

The device-independent (DI) certification of high-dimensional entanglement and complex measurement structures is central to scalable quantum information processing. While existing approaches to high-dimensional self-testing have largely relied on Bell tests with multi-outcome measurements, achieving such certification...

S. Sasmal, Ritesh K. Singh, Prabuddha Roy et al. · 0 citations
Preprint Sep 2026

Static classical-quantum-entanglement trade-offs: an entropic converse and single-letter characterizations

The direct static capacity region of a bipartite quantum state describes its asymptotic conversion into classical communication, quantum communication, and entanglement, with all communication directed from Alice to Bob. This paper gives a unified entropic converse for this region. The proof treats generated and consum...

M. Wilde · 0 citations

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