Quantum computers [1–4] are explicitly quantum mechanical systems that use phenomena
such as superposition and entanglement to perform computational tasks more efficiently …

We investigate the fundamental dimensional limits to thermodynamic machines. In
particular, we show that it is possible to construct self-contained refrigerators (ie, not …

Quantum computers present a compelling platform for the study of open quantum systems,
namely, the nonunitary dynamics of a system. Here, we investigate and report digital …

The lack of knowledge that an observer has about a system limits the amount of work it can
extract. This lack of knowledge is normally quantified using the Gibbs/von Neumann entropy …

Algorithmic cooling (AC) protocols have been predominantly studied for their cooling
capabilities, with limited attention paid to their thermodynamic properties. This work explores …

Application of multiple rounds of Quantum Error Correction (QEC) is an essential milestone
towards the construction of scalable quantum information processing devices. The …

The counter-intuitive properties of quantum mechanics have the potential to revolutionize
information processing by enabling the development of efficient algorithms with no known …

Strong local passivity is a property of multipartite quantum systems from which it is
impossible to extract energy locally. Surprisingly, if the strong local passive state displays …

Simultaneous near-certain preparation of qubits (quantum bits) in their ground states is a
key hurdle in quantum computing proposals as varied as liquid-state NMR and ion …

We experimentally demonstrate multiple rounds of heat-bath algorithmic cooling in a 3 qubit
solid-state nuclear magnetic resonance quantum information processor. By pum** …