共查询到20条相似文献,搜索用时 0 毫秒
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Examples for bounded Bose fields in two dimensions are presented. 相似文献
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F. Grassi 《Zeitschrift fur Physik C Particles and Fields》1989,44(1):129-138
A recent one flavor (zero temperature) quark matter equation of state is generalized to several flavors. It is shown that quarks undergo a first order phase transition. In addition, this equation of state depends on few parameters, one in the two flavor case, two in the three flavor case, and these parameters can be constrained by phenomenology. This equation of state is then applied to 1) the hadronquark transition in neutron stars and the determination of quark star stability, 2) the investigation of strange matter stability and possible strange star existence. 相似文献
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Cherny AY Shanenko AA 《Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics》1999,60(1):R5-R8
The well-known results concerning a dilute Bose gas with the short-range repulsive interaction should be reconsidered due to a thermodynamic inconsistency of the method being basic to much of the present understanding of this subject. The aim of our paper is to propose another way of treating the dilute Bose gas with an arbitrary strong interaction. Using the reduced density matrix of the second order and a variational procedure, this way allows us to escape the inconsistency mentioned and operate with singular potentials of the Lennard-Jones type. The derived expansion of the condensate depletion in powers of the boson density n=N/V reproduces the familiar result, while the expansion for the mean energy per particle is of the form epsilon=2 pi planck(2)an/m[1+128/(15 square root of [pi]) square root of [na(3)](1-5b/8a)+...], where a is the scattering length and b> or =0 stands for one more characteristic length depending on the shape of the interaction potential (in particular, for the hard spheres a=b). All the consideration concerns the zero temperature. 相似文献
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A microscopic approach to Fröhlich's theory of Bose condensation in biological systems is discussed. The conclusions from this microscopic analysis offer further support for Fröhlich's hypothesis. 相似文献
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The excitation spectrum of a relativistic spin-zero charged Bose gas is obtained in a dielectric response formulation. Relativity introduces a dip in the spectrum and the consequences of this dip for the thermodynamic functions are discussed. 相似文献
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In a development of the hypothesis of quark regions within massive stars, it is shown that superconductivity may arise in these stars. An analysis is made of the properties of quark atoms.Translated from Izvestiya VUZ. Fizika, No. 8, pp. 39–44, August, 1970. 相似文献
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The structure factor which is a measure of the correlation between the positions of the atoms in a fluid is calculated for a Bose fluid. Its dependence on the propagation vectork is obtained in an effort to obtain a formula that may be valid for all values ofk.One of the authors (K. M. K.) is thankful to Professor Abdus Salam and the International Centre for Theoretical Physics, Trieste, Italy, for hospitality when the above work was initiated. 相似文献
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Carsten Binnenhei 《Communications in Mathematical Physics》1998,195(2):353-372
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介绍了一种新的量子阱结构中激子问题的研究方法,即输运量蒙特卡罗模拟计算,利用这种方法,我们研究了磁场下II型量子阱中激子的状态,并进一步讨论了在一个电子-空穴分离的系统中,玻色凝聚态存在可能性问题。 相似文献
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The Bose gas in an arbitrary curved space-time is considered. A method of construction of the thermodynamic potential of a quantum gas by means of a finite-temperature Green's function is proposed. On this basis the Bose and Boltzmann distributions are derived. The behavior of the chemical potential is investigated. The phenomenon of Bose-Einstein condensation is discussed. 相似文献
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A. Gonzlez 《Fortschritte der Physik》1985,33(4):233-239
The Bose condensation of the scalar field in a theory behaving in the Coleman-Weinberg mode is considered. The effective potential of the model is computed within the semiclassical approximation in a dimensional regularization scheme. Radiative corrections are shown to introduce certain μ-dependent ultraviolet divergences in the effective potential coming from the Many-Particle theory. The weight of radiative corrections in the dynamics of the system is strongly modified by the charge density. 相似文献
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Ashok Goyal 《Pramana》2004,62(3):753-756
Recently there have been important developments in the determination of neutron star masses which put severe constraints on
the composition and equation of state (EOS) of the neutron star matter. Here we study the effect of quark and nuclear matter
mixed phase on mass radius relationship of neutron stars employing recent models from two classes of EOS’s and discuss their
implications. 相似文献
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James M. Lattimer 《General Relativity and Gravitation》2014,46(5):1-26
Neutron stars are laboratories for dense matter and gravitational physics. Observations of neutron stars from sources such as radio pulsars, low-mass X-ray binaries, X-ray bursts and thermally-emitting neutron stars are setting bounds to neutron star masses, radii, rotation rates, temperatures and ages. Mass measurements constrain the equation of state at the highest densities and set firm bounds to the highest possible density of cold matter. Radii constrain the equation of state in the vicinity of the nuclear saturation density and yield information about the density dependence of the nuclear symmetry energy. Laboratory measurements and theoretical studies of pure neutron matter are in remarkable agreement with observational bounds. 相似文献