Quantum mechanics, through the Heisenberg uncertainty principle, imposes limits on the
precision of measurement. Conventional measurement techniques typically fail to reach …

This review covers the latest developments in continuous-variable quantum-state
tomography of optical fields and photons, placing a special emphasis on its practical aspects …

We demonstrate complete characterization of a two-qubit entangling process—a linear
optics controlled-not gate operating with coincident detection—by quantum process …

The technologies of quantum information and quantum control are rapidly improving, but full
exploitation of their capabilities requires complete characterization and assessment of …

Maximum Likelihood estimation is a versatile tool covering wide range of applications, but its
benefits are apparent particularly in the quantum domain. For a given set of measurements …

We present an example of quantum process tomography (QPT) performed on a single solid-
state qubit. The qubit used is two energy levels of the triplet state in the nitrogen vacancy …

Accurate characterization of two-qubit gates will be critical for any realization of quantum
computation. We discuss a range of measurements for characterizing two-qubit gates. These …

We demonstrate a robust implementation of a deterministic linear-optical controlled-not gate
for single-photon two-qubit quantum logic. A polarization Sagnac interferometer with an …

We address the quantum characterization of photon counters based on transition-edge
sensors (TESs) and present the first experimental tomography of the positive operator …

The author presents a unified treatment of this highly interdisciplinary topic to help define the
notion of cognitive radio. The book begins with addressing issues such as the fundamental …