5 papers
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…
Multiqubit monogamy relations beyond shadow inequalities
Eduardo Serrano-Ensástiga, Olivier Giraud, John Martin
Multipartite quantum systems are subject to monogamy relations that impose fundamental constraints on the distribution of quantum correlations between subsystems. These constraints…
Universality in fidelity-based quantum metrology
Luis Aragón-Muñoz, Chryssomalis Chryssomalakos, Ana Gabriela Flores-Delgado +2
We consider the problem of identifying the quantum spin states that are the optimal sensors of a given transformation averaged over all possible orientations of the spin system. Ou…
Dynamical decoupling of interacting spins through group factorization
Colin Read, Eduardo Serrano-Ensástiga, John Martin
Dynamical decoupling (DD) is a well-known open-loop protocol for suppressing unwanted interactions in a quantum system, thereby drastically extending the coherence time of useful q…
Platonic dynamical decoupling sequences for interacting spin systems
Colin Read, Eduardo Serrano-Ensástiga, John Martin
In the NISQ era, where quantum information processing is hindered by the decoherence and dissipation of elementary quantum systems, developing new protocols to extend the lifetime…