Electric-field noise near surfaces is a common problem in diverse areas of physics and a
limiting factor for many precision measurements. There are multiple mechanisms by which …

Atomic ions trapped in electromagnetic potentials have long been used for fundamental
studies in quantum physics. Over the past two decades, trapped ions have been …

Practical and useful quantum information processing requires substantial improvements with
respect to current systems, both in the error rates of basic operations and in scale. The …

Optical atomic clocks are our most precise tools to measure time and frequency,–. Precision
frequency comparisons between clocks in separate locations enable one to probe the space …

Direct experimental access to some of the most intriguing quantum phenomena is not
granted due to the lack of precise control of the relevant parameters in their naturally …

As relative systematic frequency uncertainties in trapped-ion spectroscopy are approaching
the low 10− 18 range, motional frequency shifts account for a considerable fraction of the …

Motional heating of trapped atomic ions is a major obstacle to their use as quantum bits in a
scalable quantum computer. The detailed physical origin of this heating is not well …

Scaling trapped-ion quantum computing will require robust trap** of at least hundreds of
ions over long periods, while increasing the complexity and functionality of the trap itself …

We present the design, fabrication and experimental implementation of surface ion traps
with Y-shaped junctions. The traps are designed to minimize the pseudopotential variations …