Results 81 to 90 of about 474,978 (288)
Universe, 2020 In this work, we study the impact of quantum entanglement on the two-point correlation function and the associated primordial power spectrum of mean square vacuum fluctuation in a bipartite quantum field theoretic system.
Sayantan Choudhury, Sudhakar Panda
doaj +1 more source
Kant and Quantum Gravity [PDF]
arXiv, 2016 In quantum gravity space and time lose their status as fundamental parts of the physical reality. However, according to Kant, space and time are the a priori conditions of our experience. Does Kantian characterization of these notions give constraints to quantum gravity, or does quantum gravity make Kantian characterization of space and time an invalid
arxiv
Rapid and Reversible Morphing to Enable Multifunctionality in Robots
Advanced Intelligent Systems, EarlyView.This article introduces a rapid, reversible, and repeatable morphing robot through a bistable latch‐mediated, spring actuated (LaMSA) mechanism. This enables an untethered, multifunctional robot to near‐instantaneously (< 50 ms) and reversibly switch between a flying and driving configuration to navigate through different environments.
Brittan T. Wilcox +2 more
wiley +1 more source
Relational Lorentzian Asymptotically Safe Quantum Gravity: Showcase Model
UniverseIn a recent contribution, we identified possible points of contact between the asymptotically safe and canonical approaches to quantum gravity. The idea is to start from the reduced phase space (often called relational) formulation of canonical quantum ...
Renata Ferrero, Thomas Thiemann
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Strings, loops and others: a critical survey of the present approaches to quantum gravity [PDF]
arXiv, 1998 I review the present theoretical attempts to understand the quantum properties of spacetime. In particular, I illustrate the main achievements and the main difficulties in: string theory, loop quantum gravity, discrete quantum gravity (Regge calculus, dynamical triangulations and simplicial models), Euclidean quantum gravity, perturbative quantum ...
arxiv
Multistable Composite Laminate Grids as a Design Tool for Soft Reconfigurable Multirotors
Advanced Intelligent Systems, EarlyView.Flexible, lightweight, stable: the reconfigurable multirotor combines stable flight in multiple shapes with low‐energy reconfiguration. Utilizing optimized multistable composites, it achieves self‐locking in open and folded configurations, cutting width‐span by 48% and allowing for safe gap traversal.
Luca Girardi +4 more
wiley +1 more source
European Physical Journal C: Particles and Fields, 2017 Applying the anholonomic frame deformation method, we construct various classes of cosmological solutions for effective Einstein–Yang–Mills–Higgs, and two measure theories.
Subhash Rajpoot, Sergiu I. Vacaru
doaj +1 more source
Advanced Intelligent Systems, EarlyView.This article answers the question “Where is the best place to apply compliance in a multirotor micro aerial vehicle to make it more collision‐resilient?” by analyzing the output data of more than 1200 drone collision tests for four main configurations of micro‐quadcopters each possessing a unique softness layout of physical frame.
Amirali Abazari +3 more
wiley +1 more source
Smart Bioinspired Material‐Based Actuators: Current Challenges and Prospects
Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.This work gathers, in a review style, an extensive and comprehensive literature overview on the development of autonomous actuators based on synthetic materials, bringing together valuable knowledge from several studies. Furthermore, the article identifies the fundamental principles of actuation mechanisms and defines key parameters to address the size
Alejandro Palacios +4 more
wiley +1 more source
Complexity and operator growth for quantum systems in dynamic equilibrium
Journal of High Energy PhysicsKrylov complexity is a measure of operator growth in quantum systems, based on the number of orthogonal basis vectors needed to approximate the time evolution of an operator.
Cameron Beetar +4 more
doaj +1 more source