Zobrazeno 1 - 10
of 321
pro vyhledávání: '"Paul J, Steinhardt"'
Publikováno v:
Communications Chemistry, Vol 7, Iss 1, Pp 1-9 (2024)
Abstract Quasicrystals are of interest because of their unique nonperiodic structures and physical properties. Motivated by naturally occurring icosahedral AlCuFe- and decagonal AlNiFe-phases hosted in a shocked meteorite, different laboratories have
Externí odkaz:
https://doaj.org/article/0760763beae24b889f2748877091b913
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 7, Pp 1-30 (2024)
Abstract We recently described a protocol for computing the potential energy in heterotic M-theory for the dilaton, complex structure and Kähler moduli. This included the leading order non-perturbative contributions to the complex structure, gaugino
Externí odkaz:
https://doaj.org/article/9159c3d67493490ab2636220a3229097
Autor:
David Shlivko, Paul J. Steinhardt
Publikováno v:
Physics Letters B, Vol 855, Iss , Pp 138826- (2024)
Observational constraints on time-varying dark energy (e.g., quintessence) are commonly presented on a w0-wa plot that assumes the equation of state of dark energy strictly satisfies w(z)=w0+waz/(1+z) as a function of the redshift z. Recent observati
Externí odkaz:
https://doaj.org/article/4976b57708aa434a8c02ac9412d98722
Publikováno v:
Physical Review Research, Vol 6, Iss 3, p 033260 (2024)
In previous work [Phys. Rev. X 5, 021020 (2015)2160-330810.1103/PhysRevX.5.021020] it was shown that stealthy hyperuniform systems can be regarded as hard spheres in Fourier space in the sense that the structure factor is exactly zero in a spherical
Externí odkaz:
https://doaj.org/article/52d1bf87e5344ea185dbeb3646fb91eb
Publikováno v:
Physics Letters B, Vol 843, Iss , Pp 138028- (2023)
We present first results from a novel numerical relativity code based on a tetrad formulation of the Einstein-scalar field equations combined with recently introduced gauge/frame invariant diagnostics. The results provide support for the argument tha
Externí odkaz:
https://doaj.org/article/da30fbfc6c20415fb380ec144e636b24
Publikováno v:
Physical Review Research, Vol 5, Iss 3, p 033190 (2023)
Hyperuniform many-particle systems are characterized by a structure factor S(k) that is precisely zero as |k|→0; and stealthy hyperuniform systems have S(k)=0 for the finite range 0
Externí odkaz:
https://doaj.org/article/05072135f7254d5ba49b8517568afc02
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 6, Pp 1-14 (2020)
Abstract Perhaps the greatest challenge for fundamental theories based on compactification from extra dimensions is accommodating a period of accelerated cosmological expansion. Previous studies have identified constraints imposed by the existence of
Externí odkaz:
https://doaj.org/article/2a7aeb34388b4155be9a67bb7af8c577
Autor:
Anna Ijjas, Paul J. Steinhardt
Publikováno v:
Physics Letters B, Vol 824, Iss , Pp 136823- (2022)
We track the evolution of entropy and black holes in a cyclic universe that undergoes repeated intervals of expansion followed by slow contraction and a smooth (non-singular) bounce. In this kind of cyclic scenario, there is no big crunch and no chao
Externí odkaz:
https://doaj.org/article/b49ea80cdf6d4422bbd19b9a18171535
Publikováno v:
Physics Letters B, Vol 820, Iss , Pp 136490- (2021)
We demonstrate that the rapidity and robustness of slow contraction in homogenizing and flattening the universe found in simulations in which the initial conditions were restricted to non-perturbative variations described by a single Fourier mode alo
Externí odkaz:
https://doaj.org/article/1e068e6a93614e6686f9391bb884e58b
Autor:
Milan M. Milošević, Weining Man, Geev Nahal, Paul J. Steinhardt, Salvatore Torquato, Paul M. Chaikin, Timothy Amoah, Bowen Yu, Ruth Ann Mullen, Marian Florescu
Publikováno v:
Scientific Reports, Vol 9, Iss 1, Pp 1-11 (2019)
Abstract We introduce a hyperuniform-disordered platform for the realization of near-infrared photonic devices on a silicon-on-insulator platform, demonstrating the functionality of these structures in a flexible silicon photonics integrated circuit
Externí odkaz:
https://doaj.org/article/ac7d0b82bd79492dbba5542796c6fec9