All our former experience with application of quantum theory seems to say that what is
predicted by quantum formalism must occur in the laboratory. But the essence of quantum …

How can one prove that a given quantum state is entangled? In this paper we review
different methods that have been proposed for entanglement detection. We first explain the …

Quantum state engineering, the cornerstone of quantum photonic technologies, mainly
relies on spontaneous parametric downconversion and four-wave mixing, where one or two …

Taking advantage of quantum mechanics for executing computational tasks faster than
classical computers or performing measurements with precision exceeding the classical …

Complex optical photon states with entanglement shared among several modes are critical
to improving our fundamental understanding of quantum mechanics and have applications …

Quantum computation offers a promising new kind of information processing, where the non-
classical features of quantum mechanics are harnessed and exploited. A number of models …

Multi-level (qudit) entangled photon states are a key resource for both fundamental physics
and advanced applied science, as they can significantly boost the capabilities of novel …

General-purpose quantum computers can, in principle, entangle a number of noisy physical
qubits to realize composite qubits protected against errors. Architectures for measurement …

The development of technologies for quantum information (QI) science demands the
realization. and precise control of complex (multipartite and high dimensional) entangled …

Entangled photon sources are desirable and key elements for photonic quantum information
processing. The spontaneous parametric down‐conversion (SPDC) process is a convenient …