We briefly review the ideas that have shaped modern optics and have led to various
applications of light ranging from spectroscopy to astrophysics, and street lights to quantum …

Continuous variable one-way and controlled two-way direct secure quantum communication
schemes have been designed using Gaussian states. Specifically, a scheme for continuous …

Possible squeezed states generated in a three-waveguide nonlinear coupler operating with
second harmonic generation is discussed. This study is carried out using two well-known …

Nonclassical properties of photon added and subtracted displaced Fock states are studied
using various witnesses of lower‐and higher‐order nonclassicality. Compact analytic …

Various nonclassical and quantum phase properties of photon added then subtracted
displaced Fock state have been examined systematically and rigorously. Higher-order …

The interplay between the nonclassical features and the parity-time (PT) symmetry (or its
breaking) is studied here by considering a PT-symmetric system consisting of two cavities …

Quantum phase properties of photon added and subtracted displaced Fock states (and their
limiting cases) are investigated from a number of perspectives, and it is shown that the …

The possibility of observing nonclassical features in a physical system comprised of a cavity
with two ensembles of two-level atoms has been investigated by considering different …

Conventional coherent states (CSs) are defined in various ways. For example, CS is defined
as an infinite Poissonian expansion in Fock states, as displaced vacuum state, or as an …

Quantum Zeno and anti-Zeno effects are studied in a symmetric nonlinear optical coupler,
which is composed of two nonlinear (χ 2) waveguides that are interacting with each other via …