Share This Author
Inseparability criteria for continuous bipartite quantum states.
The conditions are formulated as an infinite series of inequalities for the moments of the state under study and the violation of any inequality of this series is a sufficient condition for entanglement.
Atmospheric Quantum Channels with Weak and Strong Turbulence.
This work derives the probability distribution for the atmospheric transmittance including beam wandering, beam shape deformation, and beam-broadening effects from the elliptic beam approximation, and applies to weak, weak-to-moderate, and strong turbulence.
Nonclassical moments and their measurement
Practically applicable criteria for the nonclassicality of quantum states are formulated in terms of different types of moments. For this purpose the moments of the creation and annihilation…
Toward global quantum communication: beam wandering preserves nonclassicality.
It turns out that beam wandering may preserve nonclassical effects, such as entanglement, quadrature and photon number squeezing, much better than a standard attenuating channel of the same losses.
Lectures on Quantum Optics
Quantization of the radiation field in the presence of passive optical devices such as beam splitters, spectral filters, and lossy cavities Theory of detection of light (photocounting, correlation…
Universal measurement of quantum correlations of radiation.
A measurement technique is proposed which, in principle, allows one to observe the general space-time correlation properties of a quantized radiation field and unifies the advantages of balanced Homodyne detection with those of homodyne correlation measurements.
Free-space quantum links under diverse weather conditions
Free-space optical communication links are promising channels for establishing secure quantum communication. Here we study the transmission of nonclassical light through a turbulent atmospheric link…
Nonclassicality of quantum states: a hierarchy of observable conditions.
A necessary and sufficient hierarchy of conditions is derived that is completely equivalent to the failure of the Glauber-Sudarshan P function to be a probability density. The conditions are…
True photocounting statistics of multiple on-off detectors
We derive a closed photo-counting formula, including noise counts and a finite quantum efficiency, for photon number resolving detectors based on on-off detectors. It applies to detection schemes…
Satellite-mediated quantum atmospheric links
The establishment of quantum communication links over a global scale is enabled by satellite nodes. We examine the influence of the Earth's atmosphere on the performance of quantum optical…