Front Cover: 2D Linear Trap Array for Quantum Information Processing (Adv. Quantum Technol. 11/2020)
Philip C. Holz, Silke Auchter, Gerald Stocker, Marco Valentini, Kirill Lakhmanskiy, Clemens Rössler, Paul Stampfer, Sokratis Sgouridis, E. Aschauer, Yves Colombe, R. Blatt · Advanced Quantum Technologies · 2020
The major challenge for trapped-ion quantum computers is to scale-up the number of qubits while preserving a high degree of control over the quantum states. The cover illustrates a scalable quantum processor with a two-dimensional lattice of ion qubits confined by an array of linear surface traps. Entanglement of nearest-neighbor ions is mediated by a Coulomb interaction with tunable strength. A configurable lattice connectivity extends the options for emulating 2D spin systems. Further information on the design, fabrication and commissioning of a prototype processor, as well as strategies to scale-up the device, are given in article number 2000031 by Philip C. Holz and co-workers.