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论现代物理学中真空理论的发展——纪念爱因斯坦提出狭义相对论100年 被引量:1
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作者 薛晓舟 《自然辩证法通讯》 CSSCI 北大核心 2005年第4期12-18,共7页
真空理论是当代基础物理学前沿四大问题之一。爱因斯坦关于真空概念的深刻思想,推动了20世纪物理学前进的过程。本文从广义相对论、量子电动力学、量子色动力学、量子味动力学、圈量子引力及超弦/M理论等多个领域,论述了现代物理学中真... 真空理论是当代基础物理学前沿四大问题之一。爱因斯坦关于真空概念的深刻思想,推动了20世纪物理学前进的过程。本文从广义相对论、量子电动力学、量子色动力学、量子味动力学、圈量子引力及超弦/M理论等多个领域,论述了现代物理学中真空理论的主要发展情景。 展开更多
关键词 爱因斯坦 相对论经典真空 量子场论真空 圈量子引力真空 超弦/M理论真空
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超强激光中原子电离的相对论半经典理论
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作者 陈宝振 《中国科学(A辑)》 CSCD 2000年第12期1109-1117,共9页
提出了超强激光 (>1 0 19W/cm2 )中氢原子电离的相对论半经典理论 .给出了基态氢原子电离几率的相对论性的解析表达式 .同非相对论性的理论比较 ,这个相对论性的解析表达式清楚地展现了光场中磁场、非偶极近似和相对论的质能关系对... 提出了超强激光 (>1 0 19W/cm2 )中氢原子电离的相对论半经典理论 .给出了基态氢原子电离几率的相对论性的解析表达式 .同非相对论性的理论比较 ,这个相对论性的解析表达式清楚地展现了光场中磁场、非偶极近似和相对论的质能关系对电离过程的影响 .同时 ,证明在一定的条件下这个电离几率的相对论性的解析表达式自动约化为非偶极近似非相对论性的解析表达式 .简单说明了超强激光中氢原子电离的相对论理论的可能应用 . 展开更多
关键词 超强激光 原子电离 相对论经典理论 Volkov解
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Relationship Between Classical and Quantum Physics
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作者 Skender Ahmetaj Skender Kabashi Gazmend Kabashi Valon Veliu 《Journal of Mathematics and System Science》 2013年第2期75-82,共8页
Schrfdinger's equation is one the equations that mark the beginnings of the systematic quantum physics. It was shown that it follows from the Dirac's equation and the relationship with classical physics, i.e. with c... Schrfdinger's equation is one the equations that mark the beginnings of the systematic quantum physics. It was shown that it follows from the Dirac's equation and the relationship with classical physics, i.e. with classical field theory was established. The subject of this work is the relationship between classical relativistic physics and the quantum physics. Investigation carded out in this work, shows that the free electromagnetic field, spinor Dirac's field without mass, spinor Dirac's field with mass, and some other fields are described by the same vibrational formulation. The conditions that a field be described by Maxwell's equations of motion are given in this work, and some solutions of these conditions are also given. Non-relativistic approximation of the equations of the non-quantified field are the Schrōdinger's equations. Dirac's equation as a special case, contains Maxwell's equations and the Schrōdinger's equation. 展开更多
关键词 RELATIONSHIP quantum physics classical physics.
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物理学哲学研究的新视野及其方法论特征
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作者 程瑞 《科学技术哲学研究》 CSSCI 北大核心 2017年第1期21-25,共5页
文章围绕爱思唯尔科学哲学手册的《物理学哲学》一书中经典相对论、宇宙学哲学问题和量子引力部分进行分析,探讨了物理学哲学研究的新视野,指出了它们所揭示的物理学概念解释的新特征以及物理学理论理解的新特征。
关键词 经典相对论 宇宙学 量子引力 概念解释 形而上学
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Time Operator in Relativistic Quantum Mechanics
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作者 Sina Khorasani 《Communications in Theoretical Physics》 SCIE CAS CSCD 2017年第7期35-38,共4页
It is first shown that the Dirac's equation in a relativistic frame could be modified to allow discrete time, in agreement to a recently published upper bound. Next, an exact self-adjoint 4 x 4 relativistic time oper... It is first shown that the Dirac's equation in a relativistic frame could be modified to allow discrete time, in agreement to a recently published upper bound. Next, an exact self-adjoint 4 x 4 relativistic time operator for spin-l/2 particles is found and the time eigenstates for the non-relativistic case are obtained and discussed. Results confirm the quantum mechanical speculation that particles can indeed occupy negative energy levels with vanishingly sma/l but non- zero probablity, contrary to the general expectation from classical physics. Hence, Wolfgang Pauli's objection regarding the existence of a self-adjoint time operator is fully resolved. It is shown that using the time operator, a bosonic field referred here to as energons may be created, whose number state representations in non-relativistic momentum space can be explicitly found. 展开更多
关键词 quantum mechanics special relativity foundations of quantum mechanics operator theory
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