Author

A. A. Abbott

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Preprint Sep 2026

All causally separable quantum processes are quantum circuits with classical control of causal order

The concept of causal (non)separability describes whether the causal order between parties that perform local quantum operations is well-defined or indefinite. Causal (non)separability in the general multipartite setting was introduced and studied in [Oreshkov and Giarmatzi, New J. Phys. 18, 093020 (2016); Wechs, Abbot...

Julian Wechs, A. A. Abbott, Cyril Branciard · 0 citations

Preprint Aug 2026

Randomness can be certified in energy-constrained semi-device-independent scenarios

This work addresses the open question affirmatively: certified randomness generation is theoretically possible in the energy-constrained SDI framework even in the presence of a fully quantum adversary by constructing semidefinite programming relaxations of the guessing probability.

S. Ranu, Lewis Wooltorton, A. A. Abbott et al. · 1 citation · ⚡1