We address the question of whether the super-Heisenberg scaling for quantum estimation is
indeed realizable. We unify the results of two approaches. In the first one, the original system …

The main power of quantum sensors is achieved when the probe is composed of several
particles. In this situation, quantum features such as entanglement contribute in enhancing …

Non-Hermitian (NH) physics predicts open quantum system dynamics with unique
topological features such as exceptional points and the NH skin effect. We show that this …

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Considering non-Hermitian systems implemented by utilizing enlarged quantum systems,
we determine the fundamental limits for the sensitivity of non-Hermitian sensors from the …

Quantum sensing is one of the key areas that exemplify the superiority of quantum
technologies. Nonetheless, most quantum sensing protocols operate efficiently only when …

Most studies in multiparameter estimation assume the dynamics is fixed and focus on
identifying the optimal probe state and the optimal measurements. In practice, however …

We consider the general problem of estimating an unknown control parameter of an open
quantum system. We establish a direct relation between the evolution of both system and …

Second order quantum phase transitions, with well-known features such as long-range
entanglement, symmetry breaking, and gap closing, exhibit quantum enhancement for …

In contrast to interferometry-based quantum sensing, where interparticle interaction is
detrimental, quantum many-body probes exploit such interactions to achieve quantum …