Results 61 to 70 of about 36,882 (207)

States of low energy in the Schwinger effect

Journal of High Energy Physics, 2023
States of low energy in cosmology minimise the energy density when smeared in a chosen time interval. We extend such construction to generic homogeneous (possibly anisotropic) particle creation settings.
Álvaro Álvarez-Domínguez, Luis J. Garay, Mercedes Martín-Benito, Rita B. Neves   +3 more
doaj   +1 more source

Enhanced Nonperturbative Effects in Z Decays to Hadrons

, 2004
We use soft collinear effective field theory (SCET) to study nonperturbative strong interaction effects in Z decays to hadronic final states that are enhanced in corners of phase space. These occur, for example, in the jet energy distribution for two jet
A.V. Manohar, A.V. Manohar, A.V. Manohar, Aneesh V. Manohar, B.R. Webber, C.L. Basham, C.L. Basham, C.W. Bauer, C.W. Bauer, C.W. Bauer, C.W. Bauer, C.W. Bauer, C.W. Bauer, Christian W. Bauer, Christopher Lee, G. Abbiendi, G. Sterman, G.P. Korchemsky, G.P. Korchemsky, G.P. Korchemsky, I. Hinchliffe, J. Abdallah, J.C. Collins, K. Abe, M. Acciarri, M. Testa, M.H. Seymour, Mark B. Wise, N.A. Sveshnikov, P. Abreu, R. Barate, S. Catani, S. Catani, S. Catani, S. Catani, S. Catani, S. Catani, Y.L. Dokshitzer, Y.L. Dokshitzer, Y.L. Dokshitzer, Y.L. Dokshitzer, Y.L. Dokshitzer   +41 more
core   +1 more source

Nonlinear Transverse Transport in a Ferromagnetic Polar Metal

Advanced Electronic Materials, EarlyView.
This work reports the observation of a nonlinear transverse response in ferromagnetic polar SrRuO3(111) thin films. The nonlinear signal exhibits a sharp enhancement across the magnetic phase transition. Through detailed scaling and theoretical analysis, the authors attribute this behavior to a sign reversal of the Berry curvature triple, establishing ...
Xuyang Sha, Xuejin Zhang, Hao Liu, Jin Cao, Ruohan Chen, Jinfeng Zhai, Dingfu Shao, Shiwei Wu, Zhen Wang, Cong Xiao, Shengyuan A. Yang, Pan He, Hangwen Guo, Jian Shen   +13 more
wiley   +1 more source

Nonperturbative infrared effects for light scalar fields in de Sitter space

, 2012
We study the phi^4 scalar field theory in de Sitter space using the 2PI effective action formalism. This formalism enables us to investigate the nonperturbative quantum effects.
Brunier T, Lenaghan J T, Onemli V K, Prokopec T, Riotto A, Takashi Arai   +5 more
core   +1 more source

Interaction of Wilson loops in confining vacuum [PDF]

, 2002
Nonperturbative and perturbative interaction mechanisms of Wilson loops in gluodynamics are studied within the background field formalism. The first one operates when distance between minimal surfaces of the loops is small and may be important for sea ...
A. B. Kaidalov, A. Bialas, A. Di Giacomo, A. Di Giacomo, A. Kramer, A. Mueller, A. Y. Dubin, B. S. De Witt, B. S. De Witt, E. A. Kuraev, F. E. Low, G. Chew, H. G. Dosch, H. G. Dosch, H. G. Dosch, H. G. Dosch, J. Honerkamp, K. G. Wilson, L. F. Abbott, L. Lukaszuk, M. E. Peskin, N. Nikolaev, N. Nikolaev, O. Nachtmann, S. Nussinov, S. V. Ivanov, S. V. Ivanov, V. Gribov, V. I. Shevchenko, V. I. Shevchenko, V. I. Shevchenko, Y. A. Simonov, Y. A. Simonov, Y. A. Simonov, Y. A. Simonov, Ya. Ya. Balitsky, Yu. A. Simonov, Yu. A. Simonov   +37 more
core   +4 more sources

Polaritonic Spectra of Optical Mie Voids

Nanophotonics, Volume 15, Issue 9, 13 May 2026.
Optical Mie voids have been shown to provide a versatile platform for polaritonic physics. Analytical and numerical analysis reveal how void resonances couple to excitonic media, enabling weak‐ and strong‐coupling regimes, polariton gaps, Q‐factor enhancement, and spatial mode localization.
Evgeny Ryabkov, Mingzhao Song, Andrey A. Bogdanov, Denis G. Baranov   +3 more
wiley   +1 more source

Nonperturbative QCD Contributions to the Semileptonic Decay Width of the B Meson [PDF]

, 1996
Nonperturbative QCD contributions to the inclusive semileptonic decay of the B meson consist of the dynamic and kinematic components. We calculate the decay width in an approach based on the light-cone expansion and the heavy quark effective theory ...
A. Bareiss, A. Czarnecki, A. F. Falk, A. F. Falk, A. V. Manohar, B. Blok, C. H. Jin, C. H. Jin, Changhao Jin, G. Altarelli, G. Martinelli, I. Bigi, I. I. Bigi, I. I. Bigi, I. I. Bigi, I.I. Bigi, J. Chay, K. Y. Lee, M. Gremm, M. Gremm, M. Luke, M. Luke, M. Neubert, M. Neubert, M. Shifman, N. Cabibbo, P. Ball, P. Ball, P. Ball, T. Mannel, T. Skwarnicki, V. Chernyak, Y. Nir   +32 more
core   +4 more sources

Lithium Niobate Quadratic Integrated Nonlinear Photonics: Enabling Ultra‐Wide Bandwidth and Ultrafast Photonic Engines

Nanophotonics, Volume 15, Issue 9, 13 May 2026.
This perspective surveys emerging quantum and classical photonic applications across operating wavelengths and timescales, highlighting persistent technological gaps in integrated light sources. We examine the unique advantages of quadratic nonlinear photonics on the thin‐film lithium niobate (TFLN) platform and discuss strategies for realizing ...
Meng Tian, Guanyu Han, Ziyao Feng, Yu Liu, Yu Wang, Wenjun Deng, Ayed Al Sayem, Qiushi Guo   +7 more
wiley   +1 more source

The Källén-Lehmann representation in de Sitter spacetime

Journal of High Energy Physics, 2023
We study two-point functions of symmetric traceless local operators in the bulk of de Sitter spacetime. We derive the Källén-Lehmann spectral decomposition for any spin and show that unitarity implies its spectral densities are nonnegative.
Manuel Loparco, João Penedones, Kamran Salehi Vaziri, Zimo Sun   +3 more
doaj   +1 more source

NS Branes in Type I Theory

, 1998
We consider novel nonperturbative effects of type I theories compactified on singular ALE spaces obtained by adding NS branes. Such effects include a description of small $E_8$ instantons at singularities.Comment: 6 pages, Harvmac.tex, updated ...
Blum, Julie D.
core   +1 more source