TY - JOUR A1 - Marzoli, Irene A1 - Tombesi, Paolo A1 - Ciaramicoli, Giacomo A1 - Werth, Guenther A1 - Bushev, Pavel A1 - Stahl, S. A1 - Schmidt-Kaler, Ferdinand A1 - Hellwig, Michael A1 - Henkel, Carsten A1 - Marx, Gerrit A1 - Jex, Igor A1 - Stachowska, Ewa A1 - Szawiola, Gustaw A1 - Walaszyk, Adrian T1 - Experimental and theoretical challenges for the trapped electron quantum computer N2 - We discuss quantum information processing with trapped electrons. After recalling the operation principle of planar Penning traps, we sketch the experimental conditions to load, cool and detect single electrons. Here we present a detailed investigation of a scalable scheme including feasibility studies and the analysis of all important elements, relevant for the experimental stage. On the theoretical side, we discuss different methods to couple electron qubits. We estimate the relevant qubit coherence times and draw implications for the experimental setting. A critical assessment of quantum information processing with trapped electrons concludes the paper. Y1 - 2009 UR - http://iopscience.iop.org/0953-4075/ U6 - https://doi.org/10.1088/0953-4075/42/15/154010 SN - 0953-4075 ER - TY - JOUR A1 - Genes, Claudiu A1 - Mari, Andrea A1 - Vitali, David A1 - Tombesi, Paolo T1 - Quantum effects in optomechanical systems N2 - The search for experimental demonstration of the quantum behavior of macroscopic mechanical resonators is a fast growing field of investigation and recent results suggest that the generation of quantum states of resonators with a mass at the microgram scale is within reach. In this chapter we give an overview of two important topics within this research field: cooling to the motional ground state and the generation of entanglement involving mechanical, optical, and atomic degrees of freedom. We focus on optomechanical systems where the resonator is coupled to one or more driven cavity modes by the radiation-pressure interaction. We show that robust stationary entanglement between the mechanical resonator and the output fields of the cavity can be generated, and that this entanglement can be transferred to atomic ensembles placed within the cavity. These results show that optomechanical devices are interesting candidates for the realization of quantum memories and interfaces for continuous variable quantum-communication networks. Y1 - 2009 UR - http://www.sciencedirect.com/science/bookseries/1049250X U6 - https://doi.org/10.1016/S1049-250x(09)57002-4 SN - 1049-250X ER -