We study the quasiprobability representation of quantum light, as introduced by Glauber and
Sudarshan, for the unified characterization of quantum phenomena. We begin with …

Deviations from classical physics when distant quantum systems become correlated are
interesting both fundamentally and operationally. There exist situations where the …

Determination of the quantum nature of correlations between two spatially separated
systems plays a crucial role in quantum information science. Of particular interest is the …

Beam splitters are routinely used for generating entanglement between modes in the optical
and microwave domains, requiring input states that are not convex combinations of coherent …

Entanglement witnesses are invaluable for efficient quantum entanglement certification
without the need for expensive quantum state tomography. Yet, standard entanglement …

Nonclassicality of light has been studied, both extensively and intensively, in terms of optical
coherent states, and various quantifiers for nonclassicality of light have been introduced in …

We consider a continuous-variable Clauser-Horne Bell-type inequality to study nonlocality in
four-mode continuous-variable systems, which goes beyond two-photon states and can be …

We make a thorough study of the spreading of quantum coherence (QC), as quantified by
the l 1-norm QC, when a qubit (a two-level quantum system) is subjected to noise quantum …

The generation and quantification of quantum entanglement is crucial for quantum
information processing. Here we study the transition of Gaussian correlation under the effect …

Entangled quantum states, such as NOON states, are of major importance for quantum
technologies due to their quantum-enhanced performance. At the same time, their quantum …