Time-dependent [current]-density functional theory for open quantum systems (OQS) has emerged as a formalism that can incorporate dissipative effects in the dynamics of many-body quantum systems. Here, we review and clarify some formal aspects of these theories that have been recently questioned in the literature. In particular, we provide theoretical support for the following conclusions: (1) ...

A number of commonly available density functionals have been tested for their ability to describe the energetics and the geometry at conical intersections in connection with the spin-restricted ensemble referenced Kohn-Sham (REKS) method. The minimum energy conical intersections have been optimized for several molecular systems, which are widely used as paradigmatic models of photochemical rear...

Homeopathy is a popular but implausible form of medicine. Contrary to many claims by homeopaths, there is no conclusive evidence that highly dilute homeopathic remedies are different from placebos. The benefits that many patients experience after homeopathic treatment are therefore most probably due to nonspecific treatment effects. Contrary to widespread belief, homeopathy is not entirely devo...

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