The uncertainty principle is a remarkable and fundamental feature in quantum mechanics
that suggests a significant lower bound to predict the results of arbitrary incompatible …

A qubit suffers decoherence when coupled to a classical or quantum environment, and
characterizing the qubit decoherence process is vital in quantum technologies. Repetitive …

Fluctuations of the qubit frequencies are one of the major problems to overcome on the way
to scalable quantum computers. Of particular importance are fluctuations with a correlation …

In spin-based architectures of quantum devices, the hyperfine interaction between the
electron spin qubit and the nuclear spin environment remains one of the main sources of …

Open quantum systems are inherently coupled to their environments, which in turn also
obey quantum dynamical rules. Restricting ourselves to dissipative dynamics, here we …

The distinguishability between two quantum states can be defined in terms of their trace
distance. The operational meaning of this definition involves a maximization over …

We consider a qubit coupled to another system (its environment) and discuss the
relationship between the effects of subjecting the qubit to either a dynamical decoupling …

Light scattering from resonantly or nearly resonantly excited systems, known as resonance
fluorescence (RF), has been gaining importance as a versatile tool for investigating quantum …

We consider a quantum probe P undergoing pure dephasing due to its interaction with a
quantum system S. The dynamics of P is then described by a well-defined sub-algebra of …

Characterizing noise is key to the optimal control of the quantum system it affects. Using a
single-qubit probe and appropriate sequences of $\pi $ and non-$\pi $ pulses, we show how …