We develop the formal approach to the angular spectrum transfer in parametric down-
conversion that allows pumping with a structured beam. The scheme is based on an …

The creation of multilevel quantum states, qudits, has revolutionized concepts for quantum
computing. Classical systems that capture behavior analogous to quantum systems have …

The Solovay-Kitaev theorem allows us to approximate any single-qubit gate to arbitrary
accuracy with a finite sequence of fundamental operations from a universal set of gates …

We show that optical fibers with a graded-index profile and thin metallic slabs can be used to
emulate a system of three ultracold strongly interacting atoms. We study the symmetries …

We propose a procedure to identify and classify genuine tripartite entanglement in pure 3-
qubit states via the Activated Bipartite Entanglement (ABE), which is defined here as the …

We show that a system of three trapped ultracold and strongly interacting atoms in one-
dimension can be emulated using an optical fiber with a graded-index profile and thin …

We propose and experimentally demonstrate that a Mach-Zehnder interferometer composed
of polarized beam splitters and a pentaprism in the place of one of the mirrors works as a …