We introduce a novel time-frequency quantum key distribution (TFQKD) scheme based on
photon pairs entangled in these two conjugate degrees of freedom. The scheme uses …

The fractional Fourier transform (FrFT), a fundamental operation in physics that corresponds
to a rotation of phase space by any angle, is also an indispensable tool employed in digital …

We present a general class of entanglement criteria for continuous variable systems. Our
criteria are based on the Husimi Q distribution and allow for optimization over the set of all …

Uncertainty relations involving incompatible observables are one of the cornerstones of
quantum mechanics. Aside from their fundamental significance, they play an important role …

We prove a general class of continuous variable entanglement criteria based on the Husimi
Q distribution, which represents a quantum state in canonical phase space, by employing a …

Quantifying entanglement in a quantum system generally requires a complete quantum
tomography followed by the NP-hard computation of an entanglement monotone …

We derive a framework for quantifying entanglement in multipartite and high dimensional
systems using only correlations in two unbiased bases. We furthermore develop such …

We improve the entropic uncertainty relations for position and momentum coarse-grained
measurements. We derive the continuous, coarse-grained counterparts of the discrete …

A proposed phase-estimation protocol based on measuring the parity of a two-mode
squeezed-vacuum state at the output of a Mach-Zehnder interferometer shows that the …

The measurement of the correlation between two quantum systems or particles has a broad
significance in physics and also plays a central role in the fields of quantum optics and …