Catalysts open up new reaction pathways that can speed up chemical reactions while not
consuming the catalyst. A similar phenomenon has been discovered in quantum information …

One of the most widely known building blocks of modern physics is Heisenberg's
indeterminacy principle. Among the different statements of this fundamental property of the …

Heat engines convert thermal energy into mechanical work and generally involve a large
number of particles. We report the experimental realization of a single-atom heat engine. An …

According to the second law, the efficiency of cyclic heat engines is limited by the Carnot
bound that is attained by engines that operate between two thermal baths under the …

The inexorable miniaturisation of technologies, the relentless drive to improve efficiency and
the enticing prospect of boosting performance through quantum effects are all compelling …

Time remains one of the least well-understood concepts in physics, most notably in quantum
mechanics. A central goal is to find the fundamental limits of measuring time. One of the …

At the intersection of quantum theory and relativity lies the possibility of a clock experiencing
a superposition of proper times. We consider quantum clocks constructed from the internal …

The characterization and control of quantum effects in the performance of thermodynamic
tasks may open new avenues for small thermal machines working in the nanoscale. We …

This article generalizes the conditional probability interpretation of time in which time
evolution is realized through entanglement between a clock and a system of interest. This …

One of the most basic notions in physics is the partitioning of a system into subsystems and
the study of correlations among its parts. In this Letter, we explore this notion in the context of …