Squeezing is a resource that enables precision enhancements in quantum metrology and
can be used as a basis for the generation of entanglement by linear optics. While strong …

A major obstacle in the way of practical quantum computing is achieving scalable and robust
high-fidelity entangling gates. To this end, quantum control has become an essential tool, as …

We establish an approximate equivalence between a generalised quantum Rabi model and
its n th order counterparts, where spin-boson interactions are nonlinear as they comprise a …

We develop theoretically and demonstrate experimentally a universal dynamical decoupling
method for robust quantum sensing with unambiguous signal identification. Our method …

We discuss a laser-free, two-qubit geometric phase gate technique for generating high-
fidelity entanglement between two trapped ions. The scheme works by ram** the spin …

We present the experimental implementation of a two-qubit phase gate, using a radio
frequency (RF) controlled trapped-ion quantum processor. The RF-driven gate is generated …

We investigate the dynamics of ion crystals in zigzag configuration in transverse magnetic
field gradients. A surface-electrode Paul trap is employed to trap 40 Ca+ ions and features …

Covert and secret quantum key distribution aims at generating information-theoretically
secret bits between distant legitimate parties in a manner that remains provably …

Nuclear magnetic resonance (NMR) schemes can be applied to micron-, and nanometer-
sized samples by the aid of quantum sensors such as nitrogen vacancy (NV) color centers in …

We present a method that combines continuous and pulsed microwave-radiation patterns to
achieve robust interactions among hyperfine trapped ions placed in a magnetic field …