Results 161 to 170 of about 1,613,840 (373)

Emergent soft-gap Anderson models at quantum criticality in a lattice Hamiltonian within dynamical mean field theory [PDF]

, 2023
K. K. Sujan, Vinayak M. Kulkarni, N. S. Vidhyadhiraja, Sudeshna Sen   +3 more
openalex   +1 more source

The Quantized $O(1,2)/O(2)\times Z_2$ Sigma Model Has No Continuum Limit in Four Dimensions. I. Theoretical Framework

, 1992
The nonlinear sigma model for which the field takes its values in the coset space $O(1,2)/O(2)\times Z_2$ is similar to quantum gravity in being perturbatively nonrenormalizable and having a noncompact curved configuration space.
Arie Kapulkin, Bryce DeWitt, Eric Myers, G. D. Mostow, J. L. deLyra, Jorge L. deLyra, Joseph Polchinski, R. S. Palais, Rob Harrington, See Kit Foong, T. E. Gallivan   +10 more
core   +1 more source

Complex Oxide‐metal Hybrid Metamaterials with Integrated Magnetic and Plasmonic Non‐noble Metal Nanostructures

Advanced Functional Materials, EarlyView.
A new alloy‐oxide vertically aligned nanocomposite (VAN) thin film with two immiscible non‐noble metal elements of Co and Cu embedded in BaTiO3 (BTO) matrix is designed and fabricated, which presents interesting magnetic, ferroelectric, and optical properties.
Jijie Huang, Bin Zhang, Danny Hermawan, Alfredo Sanjuan, Benson Kunhung Tsai, Jialong Huang, R. Edwin Garcı́a, Haiyan Wang   +7 more
wiley   +1 more source

Complex Langevin simulation of a random matrix model at nonzero chemical potential

Journal of High Energy Physics, 2018
In this paper we test the complex Langevin algorithm for numerical simulations of a random matrix model of QCD with a first order phase transition to a phase of finite baryon density. We observe that a naive implementation of the algorithm leads to phase
J. Bloch, J. Glesaaen, J. J. M. Verbaarschot, S. Zafeiropoulos   +3 more
doaj   +1 more source

Phase diagram of the Bose Kondo-Hubbard model

, 2011
We study a bosonic version of the Kondo lattice model with an on-site repulsion in the conduction band, implemented with alkali atoms in two bands of an optical lattice.
Ana Maria Rey, Michael Foss-Feig, U. Schneider   +2 more
core   +1 more source

Strain Partitioning at the Oxide Interface for the Isothermal Phase Transition in Freestanding Tri‐Layers

Advanced Functional Materials, EarlyView.
The metal–insulator transition temperature (TMI) is continuously tuned by the systematic change of relative thickness in VO2 and TiO2 films (tVO2/tTiO2${t_{{\mathrm{V}}{{\mathrm{O}}_2}}}/{t_{{\mathrm{Ti}}{{\mathrm{O}}_2}}}$) in freestanding TiO2/VO2/TiO2 tri‐layers.
Sungwon Lee, Dong Kyu Lee, Yunkyu Park, Hyeji Sim, Si‐Young Choi, Junwoo Son   +5 more
wiley   +1 more source

lattice quantum field theories with quantum symmetry

, 1998
Quantenfeldtheorien in niederen Raum-Zeit-Dimensionen (kleiner als 4) zeigen das Phänomen der Quantensymmetrie, d.h. die globale (Eich-)Symmetrie läßt sich nicht mehr durch eine Gruppe beschreiben, sondern man benötigt allgemeinere allgebraische Objekte wie zum Beispiel Quantengruppen. In dieser Arbeit werden 1+1 dimensionale Gitterquantenfeldtheorien -
openaire   +2 more sources

Simple model for quantum general relativity from loop quantum gravity

, 2010
New progress in loop gravity has lead to a simple model of `general-covariant quantum field theory'. I sum up the definition of the model in self-contained form, in terms accessible to those outside the subfield.
Alexandrov S, Ashtekar A, Ashtekar A, Atiyah M, Baez J, Baez J C, Barrett J W, Barrett J W, Barrett J W, Bianchi E, Bianchi E, Bianchi E, Bianchi E, Bianchi E, Bianchi E, Bianchi E, Bonzom V, Carlo Rovelli, Colosi D, Crane L, Ding Y, Ding Y, Dittrich B, Freidel L, Freidel L, Freidel L, Geloun J B, Kaminski W, Krajewski T, Krasnov K, Major S A, Moussouris J P, Noui K, Oriti D, Oriti D, Penrose R, Pereira R, Rivasseau V, Rovelli C, Rovelli C, Rovelli C, Thiemann T   +41 more
core   +3 more sources

Enhanced Electromechanical Response in 1D Hybrid Perovskites: Coexistence of Normal and Relaxor Ferroelectric Phases

Advanced Functional Materials, EarlyView.
The dynamic polarization reversal of coexisting normal and relaxor ferroelectrics in 1D TMAPbI₃ (tetramethylammonium, TMA) is deciphered through combined experimental and theoretical approaches. By bridging atomic‐scale motion, macroscopic polarization switching, and depolarization effects, a universal methodology is established to engineer next ...
Chen Xue, Masaru Fujibayashi, Hengming Huang, Chisato Kato, Katsuya Ichihashi, Jun Manabe, Sadafumi Nishihara, Xiao‐Ming Ren, Takayoshi Nakamura   +8 more
wiley   +1 more source

Walking, weak first-order transitions, and complex CFTs

Journal of High Energy Physics, 2018
We discuss walking behavior in gauge theories and weak first-order phase transitions in statistical physics. Despite appearing in very different systems (QCD below the conformal window, the Potts model, deconfined criticality) these two phenomena both ...
Victor Gorbenko, Slava Rychkov, Bernardo Zan   +2 more
doaj   +1 more source