Some explanations and implications of the underlying theory approach for quantum theories (QM or QFT) are discussed and suggested. This simple idea seems to have significantly nontrivial effects for our understanding of the quantum theories.
Among the (in)famous differences between classical and quantum mechanics, quantum counterfactuals seem to be the most intriguing. At the same time, they seem to underlie many quantum oddities. In this article, we propose a simple explanation for counterfactuals, on two levels. Quantum Oblivion (QO) is a fundamental type of quantum interaction that we prove to be the origin of quantum counterfactuals. It also turns out to underlie several well-known quantum effects. This phenomenon is discussed in the first part of the article, yielding some novel predictions. In the second part, a hypothesis is offered regarding the unique spacetime evolution underlying QO, termed Quantum Hesitation (QH). The hypothesis invokes advanced actions and interfering weak values, as derived first by the Two-State-Vector Formalism (TSVF). Here too, weak values are argued to underlie the familiar "strong" quantum values. With these, an event that appears to have never occurred can exert causal effects and then succumb to QO by another time-evolution involving negative weak values that eliminate them. We conclude with briefly discussing the implications of these ideas on the nature of time.
This is a conceptual paper that re-examines the principles underlying the application of renormalization theory to quantum phase transitions in the light of quantum information theory. We start by describing the intuitive argument known as the Kadanoff ``block-spin'' construction for spins fixed on a lattice and then outline some subsequent ideas by Wilson and White. We then reconstruct these concepts for quantum phase transitions from first principles. This new perspective offers some very natural explanations for some features of renormalization theory that had previously seemed rather mysterious, even contrived. It also offers some suggestions as to how we might modify renormalization methods to make them more successful. We then discuss some possible order parameters and a class of functionals that are analogues of the correlation length in such systems.
This paper introduces the Entanglement Inertia Effect (EIE), a novel concept proposing that modifying entangled states requires a comparable "inertia," analogous to the inertia experienced by macroscopic objects when their momentum changes. The core idea stems from recognizing that entanglement, while seemingly instantaneous, exhibits a dynamic behavior governed by underlying physical processes. We posit that this dynamic behavior possesses an inherent resistance to change, which we term EIE. This resistance isn't a purely mechanical inertia in the traditional sense, but rather a fundamental property linked to the complex correlations within the entangled system. We explore the implications of this concept, suggesting a potential framework for understanding the dynamics of entanglement and its connection to broader physical principles. The paper outlines a proposed experimental approach to investigate EIE, highlighting its potential significance for advancing our understanding of quantum mechanics and its potential for future technological applications. ---