Results 141 to 150 of about 1,925,015 (386)

Quantum Gravity at a Lifshitz Point [PDF]

, 2009
We present a candidate quantum field theory of gravity with dynamical critical exponent equal to $z=3$ in the UV. (As in condensed-matter systems, $z$ measures the degree of anisotropy between space and time.) This theory, which at short distances ...
Petr Hořava
semanticscholar   +1 more source

A New Class of Group Field Theories for 1st Order Discrete Quantum Gravity

, 2007
Group Field Theories, a generalization of matrix models for 2d gravity, represent a 2nd quantization of both loop quantum gravity and simplicial quantum gravity.
Baez J C, Barrett J W, D Oriti, Engle J Pereira R Rovelli C, Freidel L, Freidel L, Freidel L Krasnov K, Freidel L Krasnov K Oriti D, Gelfand I M, Gradshteyn I S, Hamber H W, Hermann R, Livine E Speziale S, Oriti D, Oriti D, Oriti D, Oriti D, Perez A, Perez A Bojowald M, Reisenberger M, Rivers R J, Rovelli C, T Tlas, Williams R   +23 more
core   +1 more source

Electronic Nanomaterials for Plants: A Review on Current Advances and Future Prospects

Advanced Electronic Materials, EarlyView.
Global food security faces mounting challenges from climate change and rapid population growth. This review highlights the pivotal role of electronic nanomaterials–including metals, metal oxides, and carbon‐based structures–in enhancing plant photosynthesis, nutrient uptake, and stress resilience. Furthermore, it explores how emerging platforms such as
Ciro Allará, Giuseppe Ciccone, Manuela Ciocca, Sahira Vasquez, Pietro Ibba, Mauro Maver, Tanja Mimmo, Paolo Lugli, Luisa Petti   +8 more
wiley   +1 more source

Krylov complexity for Jacobi coherent states

Journal of High Energy Physics
We develop computational tools necessary to extend the application of Krylov complexity beyond the simple Hamiltonian systems considered thus far in the literature.
S. Shajidul Haque, Jeff Murugan, Mpho Tladi, Hendrik J. R. Van Zyl   +3 more
doaj   +1 more source

Scalable and Integrated Photocatalytic Reactor Systems for Solar‐to‐Fuel Production: Photoredox and Photoreforming Processes

Advanced Energy Materials, EarlyView.
Solar fuels and other value‐added chemicals derived from light‐driven reactions are highly desirable. Although advanced photoactive materials have been reported, demonstrations of their feasibility in large‐scale production are needed. Hence, strategies and recent efforts in scaling up photocatalytic reactors and integrating them into comprehensive ...
Hoi Ying Chung, Roong Jien Wong, Hao Wu, Denny Gunawan, Rose Amal, Yun Hau Ng   +5 more
wiley   +1 more source

Cosmological Spectrum of Two-Point Correlation Function from Vacuum Fluctuation of Stringy Axion Field in De Sitter Space: A Study of the Role of Quantum Entanglement

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

Super-Planckian spatial field variations and quantum gravity [PDF]

, 2016
A bstractWe study scenarios where a scalar field has a spatially varying vacuum expectation value such that the total field variation is super-Planckian.
Daniel Klaewer, Eran Palti
semanticscholar   +1 more source

Testing quantum superpositions of the gravitational field with Bose-Einstein condensates

, 2004
We consider the gravity field of a Bose-Einstein condensate in a quantum superposition. The gravity field then is also in a quantum superposition which is in principle observable.
Asher Peres, J. Ruostekoski, Netanel H. Lindner   +2 more
core   +2 more sources

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, John Joyce, Michael D. Bartlett   +2 more
wiley   +1 more source

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, Giada Risso, Laura Pesaresi, Paolo Ermanni, Stefano Mintchev   +4 more
wiley   +1 more source