Erasures, or errors with known locations, are a more favorable type of error for quantum
error-correcting codes than Pauli errors. Converting physical noise into erasures can …

Experimental results are presented on the efficiency limits for a quantum interface between a
matter-based qubit and a photonic qubit. Using a trapped ion in an optical cavity, we obtain …

Abstract System scalability is fundamental for large-scale quantum computers (QCs) and is
being pursued over a variety of hardware platforms. For QCs based on trapped ions …

Emission and absorption of single photons by single atoms is a fundamental limit of matter–
light interaction, manifesting its quantum mechanical nature. As a controlled process, it is …

A systematic study of Ca+ atomic properties is carried out using a high-precision relativistic
all-order method where all single, double, and partial triple excitations of the Dirac-Fock …

We present a method for measuring branching fractions for the decay of J= 1/2 atomic
energy levels to lower-lying states based on time-resolved recording of the atom's …

We demonstrate a method to determine dipole matrix elements by comparing
measurements of dispersive and absorptive light ion interactions. We measure the matrix …

We demonstrate experimentally the existence of magic wavelengths and determine the ratio
of oscillator strengths for a single trapped ion. For the first time, two magic wavelengths near …

A quantum network combines the benefits of quantum systems regarding secure information
transmission and calculational speed-up by employing quantum coherence and …

We demonstrate polarisation-preserving frequency conversion of single-photon-level light at
854 nm, resonant with a trapped-ion transition and qubit, to the 1550-nm telecom C band. A …