Linear strings of trapped atomic ions held in radio-frequency (rf) traps constitute one of the
leading platforms for quantum simulation experiments, allowing the investigation of …

Vibrational degrees of freedom in trapped-ion systems have recently been gaining attention
as a quantum resource, beyond the role as a mediator for entangling quantum operations on …

Quantum spin models have been extensively used to study the properties of strongly
correlated systems and to find approximate solutions to combinatorial optimization …

The trapped-ion system has been a leading platform for practical quantum computation and
quantum simulation since the first scheme of a quantum gate was proposed by Cirac and …

We report the electromagnetically-induced-transparency (EIT) cooling of a large trapped
Yb+ 171 ion chain to the quantum ground state. Unlike conventional EIT cooling, we engage …

We experimentally study two-dimensional (2D) Coulomb crystals in the “radial-2D” phase of
a linear Paul trap. This phase is identified by a 2D ion lattice aligned entirely with the radial …

Two-dimensional (2D) quantum magnetism is a paradigm in strongly correlated many-body
physics. The understanding of 2D quantum magnetism can be expedited by employing a …

We investigate speeding up of relaxation of Markovian open quantum systems with the
Liouvillian exceptional point (LEP), where the slowest decay mode degenerates with a faster …

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 …

We report continuous Raman sideband cooling of a long ion chain close to the motional
ground state beyond the Lamb-Dicke (LD) regime. By driving multiple sideband transitions …