Results 121 to 130 of about 173,760 (383)

Recent Advances in Wide‐Bandgap Perovskite Solar Cells

Advanced Materials, EarlyView.
Ubiquitous defects predominately account for photo‐instability and open‐circuit voltage losses in wide‐bandgap perovskite solar cells (WBG PSCs). This review comprehensively presents the underlying impact mechanisms, summarizes the advanced optimization strategies across various functional layers and their interfaces to develop efficient and stable WBG
Jianjun Mei, Feng Yan
wiley   +1 more source

Gravitational action for a massive Majorana fermion in 2d quantum gravity

Journal of High Energy Physics
We compute the gravitational action of a free massive Majorana fermion coupled to two-dimensional gravity on compact Riemann surfaces of arbitrary genus. The structure is similar to the case of the massive scalar.
Corinne de Lacroix, Harold Erbin, Vincent Lahoche   +2 more
doaj   +1 more source

A Renormalizable Model of Quantum Gravity

, 2023
We develop a renormalizable model of Quantum General Relativity (QGR). We do this by building on earlier work with quantum electrodynamics (QED). Working with the Feynman path integral (FPI) approach to QED, we generalize the paths from varying in space to varying in space and time.
openaire   +1 more source

Mussel‐Inspired Molecular Strategies for Fabricating Functional Materials With Underwater Adhesion and Self‐Healing Properties

Advanced Materials, EarlyView.
This review systematically examines the nanomechanical mechanisms of mussel‐inspired molecular interactions, primarily investigated by direct force measurement techniques such as surface forces apparatus and atomic force microscopy. The macroscopic adhesive and self‐healing performances of mussel‐inspired functional materials, including coacervates ...
Pan Huang, Hongjian Zhang, Hongbo Zeng
wiley   +1 more source

Biological and Biologically Inspired Functional Nanostructures: Insights into Structural, Optical, Thermal, and Sensing Applications

Advanced Materials, EarlyView.
Biological and biologically‐inspired functional nanostructures with structural, thermal, optical, and sensing applications are reviewed. The role of nanoscale features in biological materials on performance is described, and their blueprints are used for bio‐inspired nanomaterials, synthesized using advanced techniques (i.e., photolithography, bio ...
Chao Hsuan (Joseph) Sung, Taige Hao, Herry Fang, Andrew Tran Nguyen, Valentina Perricone, Haitao Yu, Wei Huang, Ezra Sarmiento, Adrian Francisco Duran Ornelas, Derek Lublin, Ric Wehling, Sanaz Farajollahi, Atsushi Arakaki, Dhriti Nepal, Nathan Patrick Lord, David Kisailus   +15 more
wiley   +1 more source

Renormalizable and Unitary Model of Quantum Gravity [PDF]

Symmetry, 2019
We consider R + R 2 relativistic quantum gravity with the action where all possible terms quadratic in the curvature tensor are added to the Einstein-Hilbert term. This model was shown to be renormalizable in the work by K.S. Stelle. In this paper, we demonstrate that the R + R 2 model is also unitary contrary to the statements made
openaire   +2 more sources

Lorentz breaking Effective Field Theory and observational tests

, 2012
Analogue models of gravity have provided an experimentally realizable test field for our ideas on quantum field theory in curved spacetimes but they have also inspired the investigation of possible departures from exact Lorentz invariance at microscopic ...
A. Glushkov, A. Sakharov, A. Saveliev, A. Zee, A.G. Cohen, A.G. Cohen, A.G. Riess, A.J. Dean, A.N. Parmar, B. Altschul, B. Ward, C. Barcelo, C. Barcelo, C. Barcelo, C. Barcelo, C.F. Kennel, C.P. Burgess, C.Y. Ng, D. Anselmi, D. Blas, D. Colladay, D. Hooper, D. Mattingly, D. Mattingly, D.I. Blokhintsev, D.M. Mattingly, F. Aharonian, F. Stecker, F.W. Stecker, F.W. Stecker, G. Amelino-Camelia, G. Amelino-Camelia, G. Amelino-Camelia, G. Amelino-Camelia, G. Amelino-Camelia, G. Amelino-Camelia, G. Amelino-Camelia, G. Amelino-Camelia, G. Amelino-Camelia, G. Gelmini, G. Kanbach, G.I. Rubtsov, G.T. Zatsepin, G.W. Gibbons, G.Y. Bogoslovsky, H.B. Nielsen, H.B. Nielsen, H.B. Nielsen, I.G. Mitrofanov, J. Abraham, J. Abraham, J. Alfaro, J. Carmona, J. Carmona, J. Collins, J. Ellis, J. Kelley, J. Lukierski, J. Magueijo, J. Magueijo, J. Petri, J. Rembielinski, J.D. Bjorken, J.R. Ellis, J.R. Ellis, J.R. Ellis, J.R. Ellis, J.R. Ellis, J.R. Ellis, J.R. Ellis, K. Greisen, L. Garay, L. Maccione, L. Maccione, L. Maccione, L. Stodolsky, L.B. Rédei, M. Bleicher, M. Galaverni, M. Galaverni, M. Gasperini, M. Gasperini, M. Gasperini, M. Gasperini, M. Gasperini, M. Gonzalez-Garcia, M. Pospelov, M. Takeda, M.C. Weisskopf, M.J. Longo, N.E. Mavromatos, P. Auger, P. Auger, P. Horava, P.A. Bolokhov, P.A. Bolokhov, P.A.M. Dirac, P.R. Phillips, R. Abbasi, R. Aloisio, R. Balbinot, R. Gambini, R. Parentani, R. Protheroe, R. Schutzhold, R.C. Myers, R.J. Gleiser, S. Chadha, S. Groot Nibbelink, S. Hossenfelder, S. Judes, S. Liberati, S. Liberati, S. Liberati, S. Liberati, S. Perlmutter, S. Scully, S. Sonego, S. Weinberg, S. Weinfurtner, S. Weinfurtner, S.M. Carroll, S.R. Coleman, S.R. Coleman, S.W. Barwick, T. Damour, T. Jacobson, T. Jacobson, T. Jacobson, T. Jacobson, T.A. Jacobson, T.G. Pavlopoulos, T.P. Sotiriou, V. Baccetti, V. Baccetti, V.A. Kostelecky, V.A. Kostelecky, V.A. Kostelecky, W. Coburn, W. Huelsnitz, W. Ignatowsky von, W. Ignatowsky von, W. Ignatowsky von, W. Ignatowsky von, W. Ignatowsky von, W. Kluzniak, W. Unruh, W.H. McMaster, W.M. Yao, Y.-Z. Fan   +149 more
core   +1 more source

The projector on physical states in loop quantum gravity [PDF]

, 1998
We construct the operator that projects on the physical states in loop quantum gravity. To this aim, we consider a diffeomorphism invariant functional integral over scalar functions. The construction defines a covariant, Feynman-like, spacetime formalism
A. Ashtekar, A. Ashtekar, A. Ashtekar, A. Ashtekar, A. Ashtekar, A. Ashtekar, A. Ashtekar, A. Barbieri, C. Rovelli, C. Rovelli, C. Rovelli, C. Rovelli, C. Rovelli, C. Rovelli, C. Rovelli, C. Rovelli, C. Rovelli, C. Rovelli, C.J. Isham, F. Barbero, F. Barbero, F. Barbero, F. Markopoulou, F. Markopoulou, J. Baez, J. Barret, J. Govaerts, J. Iwasaki, J. Klauder, J. Lewandowski, J.C. Baez, J.C. Baez, J.C. Baez, L.V. Prokhorov, L.V. Prokhorov, M. Henneaux, M. Reisenberger, M. Reisenberger, N.P. Landsman, R. Borissov, R. DePietri, R. DePietri, R. Gambini, R. Loll, S.W. Hawking, T. Thiemann, T. Thiemann, T. Thiemann   +47 more
core   +2 more sources

Autonomous Implants

Advanced Materials, EarlyView.
An ideal implant should mimic native tissues such that it can integrate, sense, heal, and continue to function, i.e., be autonomous. Although early, there are good steps taken in this way, e.g., the development of stimuli‐responsive, self‐powering, self‐actuating, self‐healing, self‐regenerating, and self‐aware implants.
Jagan Mohan Dodda, Marcel F. Kunrath, Ling Zhou Zhao, Mahdi Bodaghi, Armin Yousefi, Nureddin Ashammakhi   +5 more
wiley   +1 more source

Sine-dilaton gravity vs double-scaled SYK: exploring one-loop quantum corrections

Journal of High Energy Physics
We provide non-trivial checks of the recently proposed duality between double-scaled SYK and a 2d dilaton gravity model with sine potential, studying the path integral at one-loop level.
Leonardo Bossi, Luca Griguolo, Jacopo Papalini, Lorenzo Russo, Domenico Seminara   +4 more
doaj   +1 more source