Methods for, and limitations to, the generation of entangled states of trapped atomic ions are
examined. As much as possible, state manipulations are described in terms of quantum …

One of the greatest challenges in the fields of quantum information processing and quantum
technologies is the detailed coherent control over each and every constituent of quantum …

We propose a scheme to create distant entangled atomic states. It is based on driving two
(or more) atoms with a weak laser pulse, so that the probability that two atoms are excited is …

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 study a general quantum system interacting with environment modeled by a bosonic
heat bath of Caldeira and Leggett type. General interaction Hamiltonians are considered …

A single laser–cooled and trapped 9Be+ ion is used to investigate methods of coherent
quantum–state synthesis and quantum logic. We create and characterize non–classical …

We present a one-cavity scheme for atomic-state teleportation employing the GHZ entangled
state as the quantum channel. A scheme employing a single high-Q cavity turns out to be …

In this paper we re-investigate the core of Schrödinger's “cat paradox”. We argue that one
has to distinguish clearly between superpositions of macroscopic cat states|☺>+|☹> and …

The interaction of a two-level atom with a single-mode radiation field through multiphoton
transitions is studied in terms of the dressed-state formalism. It is shown that when only …

A squeezed‐coherent‐cat state (SCCS) in a mechanical system not only plays an important
role for macroscopic quantum coherence, but also can be a carrier for quantum information …