Large-scale quantum effects have always played an important role in the foundations of
quantum theory. With recent experimental progress and the aspiration for quantum …

We discuss various methods to create macroscopic (bright) entangled light beams. As an
example, bright squeezed vacuum is considered in detail. This state of light, obtained via …

Entanglement between quantum and classical objects is of special interest in the context of
fundamental studies of quantum mechanics and potential applications for quantum …

Schrödinger's famous thought experiment involves a (macroscopic) cat whose quantum
state becomes entangled with that of a (microscopic) decaying nucleus. The creation of such …

A major challenge of the phase estimation problem is the engineering of high-intensity
entangled probe states. The goal is to significantly enhance above the shot-noise limit the …

Quantum theory is often presented as the theory describing the microscopic world, and
admittedly, it has done this extremely well for decades. Nonetheless, the question of whether …

We propose to create and detect optomechanical entanglement by storing one component
of an entangled state of light in a mechanical resonator and then retrieving it. Using micro …

We present a scheme, based on the delocalized heralded addition of a single photon, to
entangle two or more distinct field modes, each containing arbitrary light states. A high …

Displaced single-photon entanglement is a simple form of optical entanglement, obtained by
sending a photon on a beam splitter and subsequently applying a displacement operation …

We present novel theory of effective realization of large-size optical Schrödinger cat states,
which play an important role for quantum communication and quantum computation in the …