明清之际近代思维方式浅议

十七世纪中国的明、清之际,是一个“天崩地解”的时代。尖锐的民族矛盾和阶级矛盾;幼嫩、脆弱但又在缓慢发展的资本主义萌芽,人们反抗、流荡或隐居的行为方式和崇尚奢华的生活方式;蓬勃兴起的自然科学系统研究的热潮;繁荣的反映市民生活的文学艺术,这一切,使此时的社会产生了前所未有的变化。这是一个“需要巨人而且产生了巨人——在思维能力、热情和性格方面,在多才多艺和学识渊博方面的巨人的时代。”黄宗羲、王夫之、顾炎武等人的启蒙思想,作为传统思想的异端,破土而出,其思维方式包含着近代思维方式的因素,“这是一次人类从来没有经历过的最伟大、进步的变革。”     

叠加相干态及其性质

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　Ｉｎｑｕａｎｔｕｍｏｐｔｉｃｓ ,ｓｏｍｅｎｏｎ ｃｌａｓｓｉｃａｌｓｔａｔｅｓｏｆｌｉｇｈｔｈａｖｅｂｅｅｎｓｔｕｄｉｅｄｒｅｃｅｎｔｌｙ .Ｉｎｐａｒｔｉｃｕｌａｒ ,ｔｈｏｓｅｏｐｔｉｃａｌｓｕｐｅｒｐｏｓｉｔｉｏｎｓｔａｔｅｓ ,ｗｈｉｃｈａｒｅｂａｓｅｄｏｎｔｈｅｐｒｉｎｃｉｐｌｅｏｆｑｕａｎｔｕｍｓｕｐｅｒｐｏｓｉｔｉｏｎ ,ｇｉｖｅｒｉｓｅｔｏｖａｒｉｏｕｓｎｏｎ ｃｌａｓｓｉｃａｌｐｒｏｐｅｒｔｉｅｓ.Ｎｕｍｂｅｒｓｕｐｅｒｐｏｓｉｔｉｏｎｓｔａｔｅｓ[1] ａｒｅｐ…     

CAI在《误差分配和实验仪器选择》中的应用

本文详细地阐述了在物理设计性实验《误差分配和实验仪器选择》中进行CAI课件研制的设计思想和内容。通过实践，该课件优化教学过程能有效提高实验课的教学质量。     

机械合金法合成Fe25Ni75超细粉末的磁各向异性常数的研究

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　ＵｌｔｒａｆｉｎｅｐａｒｔｉｃｌｅｓｏｆｍａｇｎｅｔｉｃｍａｔｅｒｉａｌｓｓｕｃｈａｓＦｅ,Ｃｏ,Ｎｉａｎｄｔｈｅｉｒａｌｌｏｙｓｈａｖｅｔｈｅｐｏｔｅｎｔｉａｌａｐｐｌｉｃａｔｉｏｎｓｉｎｍａｇｎｅｔｉｃｒｅｃｏｒｄｉｎｇ,ｆｅｒｒｏｆｌｕｉｄｓ,ｍｅｄｉｃａｌｄｉａｇｎｏｓｔｉｃｅｔｃ..Ｔｈｅｍａｇｎｅｔｉｃｐｒｏｐｅｒｔｉｅｓｏｆｆｉｎｅｐａｒｔｉｃｌｅｓｄｉｆｆｅｒｍａｇｎｉｆｉｃｅｎｔｌｙｆｒｏｍｔｈｏｓｅｏｆｌａｒｇｅｐａｒｔｉｃｌｅｓ,ａｎｄｔｈｅｒｅｌａｔ…     

具有Stark位移的非线性双光子Jaynes-Cummings模型

Two-photon Jaynes-Cummimgs model is generalized to the case of Kerr medium in this paper,The field and atom are prepared initially in two-photon superposition state and ground state respectively.Nonlinear coefficient affects the dynamic behaviors of the field and atom.Evolutions of the squeezing for the operators of field and atom and the quantum inversion are discussed.In particular,the higher-order squeezing for atomic dipole and the effects of nonlinearity on it,which have not been studied by other authors,are investigated,Increasing the nonlinear coefficient will decrease the squeezing depth of atomic dipole.     

Tavis-Cummings模型中原子的纠缠度

1 Introduction Superposition principleis one of the fundamentals inquantum mechanics . A two-level atom may be in theground state |0〉,the excited state |1〉or the superpo-sition statesC0|0〉 C1|1〉. The coefficientsC0andC1are complex probability amplitudes of |0〉and |1〉respectively. For a system consisting of two atoms ,the state of total system may be in the direct productstates |0 ,1〉or |1 ,0〉. According to the superpositionprinciple ,the total system may also beinthe superpo-sition s…     

SU(1,1)广义相干态中的高阶涨落和SU(1,1)高阶压缩

The higher-order fluctuations in the SU(1,1)generalized coherent states are discussed.The definition of higher-order SU(1,1)squeezing is introduced in terms of higher-order uncertainty relation.For two possible bosonic realizations of SU(1,1)Lie algebra,the second-,fourth-and sixth-order SU(1,1)squeezing are examined in detail.It is shown that the SU(1,1)generalized coherent states can be squeezed to not only second-order,but also fourth-and sixth-order.Hence,it follows that the higher-order squeezing will occur for the fluctuations of the square of amplitude in squeezed vacuum.SU(1,1)higher-order squeezing is a kind of non-classical property which is independent of second-order squeezing.     

克尔介质腔中耦合三能级原子与光场相互作用系统的动力学行为

The Hamiltonian of coupled three-level atoms interacting with light field in the cavity filled with Kerr-like medium is derived. A simplified analytic solution to the Schrodinger equation of the system is obtained. The case of A type atom with degenerate lower levels is discussed in detail. It is shown that the coupling strength between atoms and Kerr coefficient affect the system＇s dynamic behaviors, especially the modulation period and oscillation frequency of the squeezing parameters of the field and the collective dipole moment. Dynamic behaviors of the system are sensitive to the initial state of atoms.     

Fe-Ni系列合金超细粉末的磁性和有效磁各向异性常数

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　Ｆｅ Ｎｉａｌｌｏｙｉｓｗｉｄｅｌｙｕｓｅｄａｓｓｏｆｔｍａｇｎｅｔｉｃｍａｔｅｒｉａｌｓｆｏｒａｌｏｎｇｔｉｍｅ .Ｉｔｓｍａｇｎｅｔｉｃｐｒｏｐｅｒｔｉｅｓａｓｉｎｉｔｉａｌｐｅｒｍｅ ａｂｉｌｉｔｙμｉａｎｄｃｏｅｒｃｉｖｉｔｙｆｏｒｃｅＨｃｄｅｐｅｎｄｓｔｒｏｎｇｌｙｏｎｔｈｅｃｈｅｍｉｃａｌｃｏｍｐｏｓｉｔｉｏｎａｎｄｔｒｅａｔｍｅｎｔｌｉｋｅｑｕｅｎｃｈｉｎｇｆｒｏｍｈｉｇｈｔｅｍｐｅｒａｔｕｒｅ .Ａｓｕｌｔｒａｆｉｎｅｐａｒｔｉｃｌｅｉｓｒｅｖｅａｌｅｄｒ…     

阻尼奇偶相干态中的相位性质及其演化

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　Ｐｈａｓｅｉｓａｎｉｍｐｏｒｔａｎｔｃｏｎｃｅｐｔｉｏｎｉｎｏｐｔｉｃｓ.Ｉｔｓｄｅｆｉｎｉ ｔｉｏｎｉｓｅｘｐｌｉｃｉｔｉｎｃｌａｓｓｉｃｏｐｔｉｃｓ,ｂｕｔｉｔｉｓｄｉｆｆｉｃｕｌｔｔｏｇｉｖｅｉｔｓｄｅｆｉｎｉｔｅｍｅａｎｉｎｇｉｎｑｕａｎｔｕｍｏｐｔｉｃｓ.Ｔｈｅｒｅｈａｖｅｂｅｅｎｓｅｖｅｒａｌｄｅｆｉｎｉｔｉｏｎｓ,ｗｈｉｃｈｈａｖｅｄｉｆｆｅｒｅｎｔｃｈａｒａｃｔｅｒｉｓｔｉｃｒｅｓｐｅｃｔｉｖｅｌｙ.ＳｏｍｅｏｆｔｈｅｍａｒｅＳｕｓｓｋｉｎｄ Ｇｌｏｇｏｗｅ…