We review concepts and methods associated with quantum discord and related topics. We
also describe their possible connections with other aspects of quantum information and …

This review covers recent theoretical and experimental efforts to extend the application of
the continuous-variable quantum technology of light beyond" Gaussian" quantum states …

Quantum sensing is one of the arenas that exemplifies the superiority of quantum
technologies over their classical counterparts. Such superiority, however, can be diminished …

We calculate the quantum Cramér-Rao bound for the sensitivity with which one or several
parameters, encoded in a general single-mode Gaussian state, can be estimated. This …

Using Venn diagrams, we classify the different types of two-mode Gaussian continuous
variable quantum correlation including directional entanglement and Einstein-Podolsky …

Interferometry with quantum light is known to provide enhanced precision for estimating a
single phase. However, depending on the parameters involved, the quantum limit for the …

We address the joint estimation of the two defining parameters of a displacement operation
in phase space. In a measurement scheme based on a Gaussian probe field and two …

For a fixed average energy, the simultaneous estimation of multiple phases can provide a
better total precision than estimating them individually. We show this for a multimode …

We address the dynamics of entanglement and quantum discord for two noninteracting
qubits initially prepared in a maximally entangled state and then subjected to a classical …

Quantum probing consists of suitably exploiting a simple, small, and controllable quantum
system to characterize a larger and more complex system. Here, we address the estimation …