Erbium ions embedded in crystals have unique properties for quantum information
processing, because of their optical transition at 1.5 μm and of the large magnetic moment of …

Accessing an ensemble of coherently interacting objects at the level of single quanta via a
proxy qubit is transformative in the investigations of emergent quantum phenomena. An …

Counting the microwave photons emitted by an ensemble of electron spins when they relax
radiatively has recently been proposed as a sensitive method for electron paramagnetic …

The ability to design quantum systems that decouple from environmental noise sources is
highly desirable for development of quantum technologies with optimal coherence. The …

The anisotropic Zeeman interaction of an ion, and the strong hyperfine interaction with its
own nucleus, can significantly influence its interactions with the local environment. These …

Impurity spins in crystal matrices are promising components in quantum technologies,
particularly if they can maintain their spin properties when close to surfaces and material …

Erbium doped crystals offer a versatile platform for hybrid quantum devices because they
combine magnetically sensitive electron-spin transitions with telecom-wavelength optical …

We present general guidelines for finding solid-state systems that could serve as coherent
electron-spin–photon interfaces even at relatively high temperatures, where phonons are …

Physical systems reach thermal equilibrium through energy exchange with their
environment, and for spins in solids the relevant environment is almost always their host …

In the vicinity of the anticrossing region of the spin sublevels, the effective magnetic moment
of the electron spin is reduced, resulting in an increase in the lifetime of the spin coherence …