ON THE COVER
August 6, 2024
Rayleigh-Bénard convection is the flow in a closed box heated from below and cooled from above. The ultimate regime of Rayleigh-Bénard turbulence occurs when the dimensionless temperature difference between the bottom and top plates is large.
Detlef Lohse and Olga Shishkina
Rev. Mod. Phys. 96, 035001 (2024)
NEW ARTICLE
The numerical treatment of quantum systems often requires large amounts of computing power and time. As a result, performing calculations repeatedly for different values of the input parameters is often not feasible. One remedy is using eigenvectors describing the system that are analytic functions that vary smoothly for real values of the input parameters. This allows one to replace computationally expensive calculations with emulators that project onto a reduced-basis set. This Colloquium explores a particular class of reduced-basis methods known as eigenvector continuation and its applications, with emphasis on nuclear physics.
Thomas Duguet et al.
Rev. Mod. Phys. 96, 031002 (2024)
NEW ARTICLE
Rayleigh-Bénard convection is the flow in a closed box heated from below and cooled from above. The ultimate regime of Rayleigh-Bénard turbulence occurs when the dimensionless temperature difference between the bottom and top plates is large. This review gives a comprehensive overview of the theoretical approaches to the ultimate regime and of the experimental and numerical results on the transition to this regime. These are reconciled by realizing that the transition is of non-normal–nonlinear nature, as typical for the laminar to turbulent transition in shear flow. The review also suggests experimental and numerical approaches to further understand the transition to the ultimate regime.
Detlef Lohse and Olga Shishkina
Rev. Mod. Phys. 96, 035001 (2024)
NEW ARTICLE
Storage of energy in quantum devices is of practical relevance for applications in quantum technologies. The topic attracts attention also of a more foundational character due to the possibility that the charging power and work extraction can benefit from quantum coherence and collective effects. This Colloquium reviews theoretical concepts and experimental implementations of energy storage in quantum batteries drawing on work in quantum thermodynamics and quantum information science.
Francesco Campaioli et al.
Rev. Mod. Phys. 96, 031001 (2024)
NEW ARTICLE
A branch of quantum information is concerned with transformations that are possible given certain resources: for example, quantum teleportation moves a quantum state from one place to another, aided by entanglement and classical communication. Certain other tasks are provably impossible. But, as surveyed in this review, a surprising fact is that some tasks become possible if another quantum state is present, even if this state is returned untouched at the end of the task. This “quantum catalysis” enables a large variety of interesting tasks, with applications ranging from cryptography to thermodynamics.
Patryk Lipka-Bartosik, Henrik Wilming, and Nelly H. Y. Ng
Rev. Mod. Phys. 96, 025005 (2024)