Optical communication channels have redefined the scope and applications of classical
computing; similarly, photonic transfer of quantum information promises to open new …

We report on an elementary quantum network of two atomic ions separated by 230 m. The
ions are trapped in different buildings and connected with 520 (2) m of optical fiber. At each …

Proposed quantum networks require both a quantum interface between light and matter and
the coherent control of quantum states,. A quantum interface can be realized by entangling …

We prepare a maximally entangled state of two ions and couple both ions to the mode of an
optical cavity. The phase of the entangled state determines the collective interaction of the …

We present and characterize fiber mirrors and a miniaturized ion-trap design developed to
integrate a fiber-based Fabry-Perot cavity (FFPC) with a linear Paul trap for use in cavity …

An autonomous quantum thermal machine comprising a trapped atom or ion placed inside
an optical cavity is proposed and analysed. Such a machine can operate as a heat engine …

One model for quantum networks, is based on the probabilistic measurement of two
photons, each entangled with a distant node, such as an atom or atomic ensemble,,,,. A …

We demonstrate precise control of the coupling of each of two trapped ions to the mode of
an optical resonator. When both ions are coupled with near-maximum strength, we generate …

We introduce measurement-based quantum repeaters, where small-scale measurement-
based quantum processors are used to perform entanglement purification and entanglement …

High-dimensional quantum systems have been used to reveal interesting fundamental
physics and to improve information capacity and noise resilience in quantum information …