3 papers
quant-ph2026
Total, quantum, and classical measures of anticoherence for mixed spin states
Jérôme Denis, Tara Lacaille, John Martin +1
Anticoherent spin states have isotropic low-order spin moments and are relevant to direction-independent metrology and quantum reference-frame alignment. In contrast to pure states…
quant-ph2025
Coherent Generation and Protection of Anticoherent Spin States
Jérôme Denis, Colin Read, John Martin
We report the first protocol specifically designed to generate anticoherent spin- states at different orders. The protocol consists of cycles of a rotation pulse about an axis f…
quant-ph2023
Absolute separability witnesses for symmetric multiqubit states
Eduardo Serrano-Ensástiga, Jérôme Denis, John Martin
The persistent separability of certain quantum states, known as symmetric absolutely separable (SAS), under symmetry-preserving global unitary transformations is of key significanc…