Search Results - "Steinhardt, Paul J."

Classically Stable Nonsingular Cosmological Bounces by Ijjas, Anna, Steinhardt, Paul J

“…One of the fundamental questions of theoretical cosmology is whether the Universe can undergo a nonsingular bounce, i.e., smoothly transit from a period of…”
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Designer disordered materials with large, complete photonic band gaps by Florescu, Marian, Torquato, Salvatore, Steinhardt, Paul J

“…We present designs of 2D, isotropic, disordered, photonic materials of arbitrary size with complete band gaps blocking all directions and polarizations. The…”
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SUPERMASSIVE BLACK HOLES FROM ULTRA-STRONGLY SELF-INTERACTING DARK MATTER by Pollack, Jason, Spergel, David N., Steinhardt, Paul J.

“…ABSTRACT We consider the cosmological consequences if a small fraction ( ) of the dark matter is ultra-strongly self-interacting, with an elastic…”
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Dark energy, extra dimensions, and the Swampland by Montefalcone, Gabriele, Steinhardt, Paul J., Wesley, Daniel H.

“…A bstract Perhaps the greatest challenge for fundamental theories based on compactification from extra dimensions is accommodating a period of accelerated…”
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Stable vacua with realistic phenomenology and cosmology in heterotic M-theory satisfying Swampland conjectures by Deffayet, Cédric, Ovrut, Burt A., Steinhardt, Paul J.

“…A bstract We recently described a protocol for computing the potential energy in heterotic M-theory for the dilaton, complex structure and Kähler moduli. This…”
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Natural Quasicrystals by Bindi, Luca, Steinhardt, Paul J, Yao, Nan, Lu, Peter J

“…Quasicrystals are solids whose atomic arrangements have symmetries that are forbidden for periodic crystals, including configurations with fivefold symmetry…”
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Antigravity and the big crunch/big bang transition by Bars, Itzhak, Chen, Shih-Hung, Steinhardt, Paul J., Turok, Neil

“…We point out a new phenomenon which seems to be generic in 4d effective theories of scalar fields coupled to Einstein gravity, when applied to cosmology. A…”
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Scale-invariant perturbations in ekpyrotic cosmologies without fine-tuning of initial conditions by Levy, Aaron M., Ijjas, Anna, Steinhardt, Paul J.

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Isotropic band gaps and freeform waveguides observed in hyperuniform disordered photonic solids by Man, Weining, Florescu, Marian, Williamson, Eric Paul, He, Yingquan, Hashemizad, Seyed Reza, Leung, Brian Y. C., Liner, Devin Robert, Torquato, Salvatore, Chaikin, Paul M., Steinhardt, Paul J.

“…Recently, disordered photonic media and random textured surfaces have attracted increasing attention as strong light diffusers with broadband and wide-angle…”
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Light Localization in Local Isomorphism Classes of Quasicrystals by Lin, Chaney, Steinhardt, Paul J, Torquato, Salvatore

“…We study a continuum of photonic quasicrystal heterostructures derived from local isomorphism (LI) classes of pentagonal quasicrystal tilings. These tilings…”
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Decagonal and Quasi-Crystalline Tilings in Medieval Islamic Architecture by Lu, Peter J, Steinhardt, Paul J

“…The conventional view holds that girih (geometric star-and-polygon, or strapwork) patterns in medieval Islamic architecture were conceived by their designers…”
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Previously unknown quasicrystal periodic approximant found in space by Bindi, Luca, Pham, Joyce, Steinhardt, Paul J.

“…We report the discovery of Al 34 Ni 9 Fe 2 , the first natural known periodic crystalline approximant to decagonite (Al 71 Ni 24 Fe 5 ), a natural quasicrystal…”
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Hyperuniform disordered waveguides and devices for near infrared silicon photonics by Milošević, Milan M., Man, Weining, Nahal, Geev, Steinhardt, Paul J., Torquato, Salvatore, Chaikin, Paul M., Amoah, Timothy, Yu, Bowen, Mullen, Ruth Ann, Florescu, Marian

“…We introduce a hyperuniform-disordered platform for the realization of near-infrared photonic devices on a silicon-on-insulator platform, demonstrating the…”
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Hyperuniformity in amorphous silicon based on the measurement of the infinite-wavelength limit of the structure factor by Xie, Ruobing, Long, Gabrielle G., Weigand, Steven J., Moss, Simon C., Carvalho, Tobi, Roorda, Sjoerd, Hejna, Miroslav, Torquato, Salvatore, Steinhardt, Paul J.

“…We report the results of highly sensitive transmission X-ray scattering measurements performed at the Advanced Photon Source, Argonne National Laboratory, on…”
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Unstable growth of curvature perturbations in nonsingular bouncing cosmologies by Xue, BingKan, Steinhardt, Paul J

“…Bouncing cosmologies require an ekpyrotic contracting phase (w≫1) in order to achieve flatness, homogeneity, and isotropy. Models with a nonsingular bounce…”
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Adiabatic ekpyrosis: scale-invariant curvature perturbations from a single scalar field in a contracting universe by Khoury, Justin, Steinhardt, Paul J

“…The Universe can be made flat and smooth by undergoing a phase of ultraslow (ekpyrotic) contraction, a condition achievable with a single, canonical scalar…”
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A Cyclic Model of the Universe by Steinhardt, Paul J., Turok, Neil

“…We propose a cosmological model in which the universe undergoes an endless sequence of cosmic epochs that begin with a "bang" and end in a "crunch."…”
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Shock Synthesis of Five-component Icosahedral Quasicrystals by Oppenheim, Julius, Ma, Chi, Hu, Jinping, Bindi, Luca, Steinhardt, Paul J., Asimow, Paul D.

“…Five-component icosahedral quasicrystals with compositions in the range Al 68–73 Fe 11–16 Cu 10–12 Cr 1–4 Ni 1–2 were recently recovered after shocking…”
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A delicate universe: compactification obstacles to D-brane inflation by Baumann, Daniel, Dymarsky, Anatoly, Klebanov, Igor R, McAllister, Liam, Steinhardt, Paul J

“…We investigate whether explicit models of warped D-brane inflation are possible in string compactifications. To this end, we study the potential for D3-brane…”
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A new kind of cyclic universe by Ijjas, Anna, Steinhardt, Paul J.

“…Combining intervals of ekpyrotic (ultra-slow) contraction with a (non-singular) classical bounce naturally leads to a novel cyclic theory of the universe in…”
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