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within **u-**u Zhang Remove this filter Physics Remove this filter Classical and Quantum Gravitation, Relativity Theory Remove this filter

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  1. No Access

    Article

    A commutativity theorem of partial differential operators

    Letu=u(x, t) be a function ofx andt, andu i =D i u,D=d/dx,i=0, 1, 2, ..., be its derivatives with respect tox. Denote byW

    Gui-zhang Tu in Communications in Mathematical Physics (1980)

  2. No Access

    Article

    Entropy of self-gravitating radiation

    We examine the entropy of self-gravitating radiation confined to a spherical box of radiusR in the context of general relativity. We expect that configurations (i.e., initial data) which extremize total entropy w...

    Rafael D. Sorkin, Robert M. Wald, Zhang Zhen Jiu in General Relativity and Gravitation (1981)

  3. No Access

    Article

    Approximate solutions for theR +R 2 theories of gravitation: Torsion components

    We search for vacuum solutions of a spherically symmetric and static field for the nineparameterR+R 2 gravitational theories in a weak-field limit. In this paper approximate solutions of torsion are obtained.

    Y. Z. Zhang, K. Y. Guan in General Relativity and Gravitation (1984)

  4. No Access

    Chapter and Conference Paper

    Fluorescence Enhancement of Rhodamine 6G Molecules in TiO2 Semiconductor Colloid

    Since the discovery of Surface-Enhanced Raman Scattering(1) much effort has been devoted to understanding the nature of the interaction of molecules with rough surfaces. Several theoretical models have been sugge...

    B. Zhang, C. Zunsheng in Quantum Optics IV (1986)

  5. No Access

    Chapter

    Collective Flow of Charged Fragments and Neutrons from Bevalac Experiment 848H

    Bevalac Experiment 848H was designed to probe the nuclear equation-of-state by measuring triple-differential cross sections dσ/d cosθ d(ϕ - ϕ R) dY for neutrons from high-multiplicity collisions o...

    J. Schambach, R. Madey, W. M. Zhang, M. Elaasar, D. Keane… in The Nuclear Equation of State (1989)

  6. No Access

    Chapter

    Meson and Quark Degrees of Freedom in Nuclear Matter and Finite Nuclei

    Since the middle of fifties, people had tried to build a fundamental nuclear theory on the basis of nonrelativistic quantum many-body theory for nucleons interacting each other by two-body nuclear forces. But ...

    Qi-Ren Zhang in The Nuclear Equation of State (1989)

  7. No Access

    Chapter

    Quantum Mechanics of Black Holes in Curved Space-Time

    In quantum theory, all physical fields are described on a fundamental level by the principle of quantum theory. In the Heisenberg picture, the quantum states of systems are represented by vector in a Hilbert s...

    Zhang Zhenjiu, Huang Huanran, Bao Gong… in Quantum Mechanics in Curved Space-Time (1990)

  8. No Access

    Article

    Quantum group invariants and link polynomials

    A general method is developed for constructing quantum group invariants and determining their eigenvalues. Applied to the universalR-matrix this method leads to the construction of a closed formula for link polyn...

    R. B. Zhang, M. D. Gould, A. J. Bracken in Communications in Mathematical Physics (1991)

  9. No Access

    Article

    How to find the Lax pair from the Yang-Baxter equation

    We show explicitly how to construct the quantum Lax pair from the Yang-Baxter equation. We demonstrate the new method by applying it to the Heisenberg XYZ model.

    M. Q. Zhang in Communications in Mathematical Physics (1991)

  10. No Access

    Book

    Black Hole Physics

    Venzo De Sabbata, Zhenjiu Zhang in NATO ASI Series (1992)

  11. No Access

    Chapter

    Physics of Black Holes: Classical, Quantum and Astrophysical

    We discuss the classical, quantum and astrophysical black hole physics. Black hole thermodynamics and entropy production from the collapse process are also discussed.

    Zhenjiu Zhang in Black Hole Physics (1992)

  12. No Access

    Article

    Is there evidence for torsion?

    Under the assumption of a pulsar's magnetic field originating from the net polarized spin of its neutrons, and by using the post-Newtonian approximated torsion in the fifth order in (v/c), the spin precession ari...

    Cheng-min Zhang, Guo-chen Yang, Fang-pei Chen… in General Relativity and Gravitation (1992)

  13. No Access

    Article

    Inertial range scaling of laminar shear flow as a model of turbulent transport

    Asymptotic scaling behavior, characteristic of the inertial range, is obtained for a fractal stochastic system proposed as a model for turbulent transport.

    Qiang Zhang, James Glimm in Communications in Mathematical Physics (1992)

  14. No Access

    Article

    A new coordinate condition in general relativity

    In this paper, a new coordinate condition in general relativity is proposed. This coordinate condition is just Euler's equations of the harmonic map theory. It is shown that in case of rectangular coordinates ...

    Yishi Duan, Shengli Zhang, Licai Jiang in General Relativity and Gravitation (1992)

  15. No Access

    Chapter

    Quantum Origin of Noise and Fluctuations in Cosmology

    We address two basic issues in the theory of galaxy formation from fluctuations of quantum fields: 1) the nature and origin of noise and fluctuations and 2) the conditions for using a classical stochastic equa...

    B. L. Hu, Juan Pablo Paz, Yuhong Zhang in The Origin of Structure in the Universe (1993)

  16. No Access

    Article

    Quantum invariants at the sixth root of unity

    A general topological formula is given for theSU (2) quantum invariant of a 3-manifoldM at the sixth root of unity. It is expressed in terms of the homology, Witt invariants and signature defects of the various 2...

    Robion Kirby, Paul Melvin, **ngru Zhang in Communications in Mathematical Physics (1993)

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    Article

    Convergence of the Godunov scheme for a simplified one-dimensional hydrodynamic model for semiconductor devices

    Convergence of approximate solutions derived by the Godunov scheme for a simplified one-dimensional hydrodynamic model for semiconductor devices is established by using the compensated compactness method. A gl...

    Bo Zhang in Communications in Mathematical Physics (1993)

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    Chapter

    Compression, Expansion, and Freeze-Out in Nucleus-Nucleus Collisions at the AGS

    In the following we will present selected aspects of recent data on central nucleus-nucleus collisions taken by the E814/E877 collaboration at the BNL-AGS. We will first demonstrate that stop** is nearly com...

    Peter Braun-Munzinger, J. Barrette, R. Bellwied, S. Bennett… in Hot and Dense Nuclear Matter (1994)

  19. No Access

    Chapter

    R-W Cosmological Solution for Polytropes

    Einstein’s theory of general relativity has given modern physics a consistent and fruitful framwork in which to study cosmology.

    Zhang Zhenjiu, Huang Huanran, Huang **ntang, Guo Kexin… in Cosmology and Particle Physics (1994)

  20. No Access

    Article

    On the finite-time behaviour for nonlinear Schrödinger equations

    Consider the nonlinear Schrödinger equationu t −iΔu=f(u). Forf(u)=±|u|1+p , ±i|u|1+p , ±u|u| p (p>0), and the Dirichlet boundary or nonlinear ...

    Zhang Jian in Communications in Mathematical Physics (1994)

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