Engines are systems and devices that convert one form of energy into another, typically into
a more useful form that can perform work. In the classical setup, physical, chemical, and …

Laser-cooled and trapped atomic ions form an ideal standard for the simulation of interacting
quantum spin models. Effective spins are represented by appropriate internal energy levels …

Thermodynamics originated in the need to understand novel technologies developed by the
Industrial Revolution. However, over the centuries, the description of engines, refrigerators …

Quantum technologies are currently the object of high expectations from governments and
private companies, as they hold the promise to shape safer and faster ways to extract …

A quantum thermal machine is an open quantum system coupled to hot and cold thermal
baths. Thus, its dynamics can be well understood using the concepts and tools from non …

The ability of the internal states of a working fluid to be in a coherent superposition is one of
the basic properties of a quantum heat engine. It was recently predicted that in the regime of …

The quantum battery (QB) makes use of quantum effects to store and supply energy, which
may outperform its classical counterpart. However, there are two challenges in this field. One …

The study of quantum thermal machines, and more generally of open quantum systems,
often relies on master equations. Two approaches are mainly followed. On the one hand …

We realize a heat engine using a single-electron spin as a working medium. The spin
pertains to the valence electron of a trapped Ca+ 40 ion, and heat reservoirs are emulated …

Quantum heat engines are expected to outperform the classical counterparts due to
quantum coherences involved. Here we experimentally execute a single-ion quantum heat …