We investigate pair creation by an electric field in four-dimensional de Sitter space. The expectation value of the induced current is computed, using the method of adiabatic regularization. Under strong electric fields the behavior of the current is similar to that in flat space, while under weak electric fields the current becomes inversely proportional to the mass squared of the charged field. Thus we find that the de Sitter space obtains a large conductivity under weak electric fields in the presence of a charged field with a tiny mass. We then apply the results to constrain electromagnetic fields in the early universe. In particular, we study cosmological scenarios for generating large-scale magnetic fields during the inflationary era. Electric fields generated along with the magnetic fields can induce sufficiently large conductivity to terminate the phase of magnetogenesis. For inflationary magnetogenesis models with a modified Maxwell kinetic term, the generated magnetic fields cannot exceed 10^{-30} G on Mpc scales in the present epoch, when a charged field carrying an elementary charge with mass of order the Hubble scale or smaller exists in the Lagrangian. Similar constraints from the Schwinger effect apply for other magnetogenesis mechanisms.
Inflationary magnetogenesis in Proca electrodynamics with Schwinger particle production
Università di Camerino（卡梅里诺大学）；Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Perugia（意大利国家核物理研究所佩鲁伽分部）；Department of Nanoscale Science and Engineering, University at Albany-SUNY（奥尔巴尼州立大学纳米科学与工程系）；Istituto Nazionale di Astrofisica (INAF), Osservatorio Astronomico di Brera（意大利国家天体物理研究所布雷拉天文台）；Al-Farabi Kazakh National University（阿尔法拉比哈萨克国立大学）
Nordita（诺尔迪塔）；KTH Royal Institute of Technology（瑞典皇家理工学院）；Stockholm University（斯德哥尔摩大学）；The Oskar Klein Centre（奥斯卡·克莱因中心）；Texas Center for Cosmology and Astroparticle Physics（德州宇宙学与天体粒子物理中心）；Weinberg Institute for Theoretical Physics（温伯格理论物理研究所）；Department of Physics, The University of Texas at Austin（德克萨斯大学奥斯汀分校物理系）；Department of Physics, Harvard University（哈佛大学物理系）；McWilliams Center for Cosmology & Department of Physics, Carnegie Mellon University（卡内基梅隆大学麦克威廉斯宇宙学中心及物理系）；School of Natural Sciences and Medicine, Ilia State University（伊利亚州立大学自然科学与医学院）
Inflationary magnetogenesis from non-minimal coupling in large- and small-field potentials
Università di Camerino（卡梅里诺大学）；University at Albany-SUNY（奥尔巴尼州立大学（纽约州立大学））；INAF - Osservatorio Astronomico di Brera（意大利国家天体物理研究所布雷拉天文台）；Al-Farabi Kazakh National University（阿尔法拉比哈萨克国立大学）；Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Perugia（意大利国家核物理学院佩鲁吉亚分部）
Universidad de Granada（格拉纳达大学）；Universidad de Coimbra（科英布拉大学）；Jožef Stefan Institute（约瑟夫·史特凡研究所）；Institute for Fundamental Physics of the Universe (IFPU)（宇宙基础物理研究所）
Classical constant electric fields and the Schwinger effect in de Sitter
Universidad de Granada（格拉纳达大学）；Universidad de Coimbra, Faculdade de Ciências e Tecnologia da Universidade de Coimbra（科英布拉大学科学与技术学院）；Jožef Stefan Institute（约瑟夫·斯特凡研究所）；Institute for Fundamental Physics of the Universe (IFPU)（宇宙基础物理研究所）
Fermionic Schwinger effect and induced current in de Sitter space
研究了1+3维de Sitter时空中自旋为1/2的带电粒子在静态电场作用下的Schwinger效应。我们解析地计算了产生的粒子在电场中感应的旋量电流的真空期望值。重整化是用绝热减方案进行的。我们发现，如果电场弱于依赖于费米子质量的某个阈值，则电流变为负值，即它沿与电场相反的方向流动，这也发生在1+3 de Sitter时空中的标量带电粒子的情况下。然而，与标量情况相反，在旋量情况下不存在IR超导电性。
Scalar QED effective action in dS: implications for primordial magnetogenesis and the running of coupling constants
University of Kashan（卡尚大学）；Institute for Basic Science（韩国基础科学研究院）；Ningbo University（宁波大学）；ICRANet（国际相对论天体物理中心网络）；Kunsan National University（群山市立大学）；Université de Strasbourg（斯特拉斯堡大学）；Sapienza University of Rome（罗马第一大学）；INFN, Sezione di Perugia（意大利国家核物理研究所佩鲁贾分部）；ICTP-AP, University of Chinese Academy of Sciences（中国科学院大学）
Accurate correction of arbitrary spin fermions quantum tunneling from non-stationary Kerr-de Sitter black hole based on corrected Lorentz dispersion relation
Fermionic fields of higher spin in de Sitter space
King’s College London（伦敦国王学院）；KU Leuven（荷语鲁汶大学）；UMONS（蒙斯大学）；Instituto de Física de La Plata - CONICET（拉普拉塔物理研究所-阿根廷国家科学研究委员会）；Universidad Nacional de La Plata（拉普拉塔国立大学）
Effect of gluon condensate on holographic Schwinger effect
本文在具有胶子凝聚反反应的变形反德西特（AdS）背景下，对全息施温格效应进行了势分析。我们确定的潜力，通过分析的经典字符串的作用附加在一个探针D3-膜坐在一个中间位置的散装AdS空间。结果表明，胶子凝聚的加入降低了生成速率，与温度的影响相反。此外，我们还计算了临界电场的Dirac Born Infeld（DBI）作用。
