Linear quantum measurements with independent particles are bounded by the standard
quantum limit, which limits the precision achievable in estimating unknown phase …

The phase‐space formulation of quantum mechanics has recently seen increased use in
testing quantum technologies, including methods of tomography for state verification and …

Spin systems are an attractive candidate for quantum-enhanced metrology. Here we
develop a variational method to generate metrological states in small dipolar-interacting …

We theoretically investigate how entangled atomic states generated via spin-changing
collisions in a spinor Bose-Einstein condensate can be designed and controllably prepared …

The nonclassicality of simple spin systems as measured by Wigner negativity is studied on a
spherical phase space. Several SU (2)-covariant states with common qubit representations …

Understanding the evolution of a multi-qubit quantum system, or elucidating what portion of
the Hilbert space is occupied by a quantum dataset becomes increasingly hard with the …

Considering the unique energy level structure of the one-axis twisting Hamiltonian in
combination with standard rotations, we propose the implementation of a rapid adiabatic …

The Majorana stellar representation is used to characterize spin states that have a
maximally negative Wigner quasiprobability distribution on a spherical phase space. These …

Phase spaces as given by the Wigner distribution function provide a natural description of
infinite-dimensional quantum systems. They are an important tool in quantum optics and …

Peculiarities of multiqubit measurement are for the most part similar to peculiarities of
measurement for qudit—quantum object with finite-dimensional Hilbert space. Three …