Quantum computers have made extraordinary progress over the past decade, and
significant milestones have been achieved along the path of pursuing universal fault-tolerant …

The notion of universal quantum computation can be generalized to multilevel qudits, which
offer advantages in resource usage and algorithmic efficiencies. Trapped ions, which are …

We present a method for achieving high fidelity state preparation and measurement (SPAM)
using trapped ion hyperfine qubits with nuclear spins higher than I= 1/2. The ground states …

In recent years, there have been significant progress toward building a practical quantum
computer, demonstrating key ingredients such as single-qubit gates and a two-qubit …

We report the electromagnetically induced transparency (EIT) cooling of Ba+ 137 ions with a
nuclear spin of I= 3/2, which are a good candidate of qubits for future large-scale trapped-ion …

Future quantum networks will require the ability to produce matter-photon entanglement at
photon frequencies not naturally emitted from the matter qubit. This allows for a hybrid …

This whitepaper is an outcome of the workshop Intersections between Nuclear Physics and
Quantum Information held at Argonne National Laboratory on 28-30 March 2018 [www. phy …

Ba 133+ has been identified as an attractive ion for quantum information processing due to
the unique combination of its spin-1/2 nucleus and visible wavelength electronic transitions …

In this paper, direct observation of micromotion for multiple ions in a laser-cooled trapped
ion crystal is discussed along with a measurement technique for micromotion amplitude …

Measurement of the Ba+ 138 S 2 1/2-D 2 5/2 clock transition frequency and D 5/2 Landé g J
factor are reported. The clock transition frequency ν Ba+= 170 126 432 449 333.31±(0.39) …