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• (author = "Chen, X." AND subject = "Physics")
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author = "Chen, X." > : "Physics" (x)
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Found 162 documents, displaying page 1 of 17

Boltzmann Distribution and Temperature of Stock Markets

Author(s) : Kleinert, H. , Chen, X. J.
Description : The minute fluctuations of of S&P 500 and NASDAQ 100 indices display Boltzmann statistics over a wide range of positive as well as negative returns, thus allowing us to define a {\em market temperature} for either sign. With increasing time the sharp Boltzmann peak broadens into a Gaussian whose v...
Repository : arXiv
Language(s) : Undetermined

Finite-Size Effects in the $\phi^{4}$ Field Theory Above the Upper Critical Dimension

Author(s) : Chen, X. S. , Dohm, V.
Description : We demonstrate that the standard O(n) symmetric $\phi^{4}$ field theory does not correctly describe the leading finite-size effects near the critical point of spin systems on a $d$-dimensional lattice with $d > 4$. We show that these finite-size effects require a description in terms of a lattice ...
Repository : arXiv
Language(s) : Undetermined

Strange quark polarization of the nucleon: A parameter-independent prediction of the chiral potential model

Author(s) : Chen, X. B. , Chen, X. S. , Faessler, Amand , Gutsche, Th. , Wang, F.
Description : We perform a one-loop calculation of the strange quark polarization ($\Delta s$) of the nucleon in a SU(3) chiral potential model. We find that if the intermediate excited quark states are summed over in a proper way, i.e., summed up to a given energy instead of given radial and orbital quantum nu...
Repository : arXiv
Language(s) : Undetermined

Positive strangeness contribution to the nucleon magnetic moment in a relativistic chiral potential model

Author(s) : Chen, X. B. , Chen, X. S. , Faessler, Amand , Gutsche, Th. , Wang, F.
Description : The strangeness contribution to the nucleon magnetic moment is calculated at the one-loop level in a relativistic SU(3) chiral potential model and is found to be {\em positive}, that is, with an {\em opposite} sign to the nucleon strangeness polarization. It is the ``Z'' diagram that violates the ...
Repository : arXiv
Language(s) : Undetermined

Renormalization of quark axial current in the chiral potential model

Author(s) : Chen, X. S. , Chen, X. B. , Faessler, Amand , Gutsche, Th. , Wang, F.
Description : Non-conserved composite operators like the quark axial current have divergent matrix elements therefore must be renormalized. We explore how this can be done in quark model calculations where the systematic procedure of dimensional regularization and minimal subtraction is not applicable. We propo...
Repository : arXiv
Language(s) : Undetermined

Water bath calorimetric study of excess heat generation in 'resonant transfer' plasmas

Author(s) : Phillips, J. , Mills, R. L. , Chen, X.
Description : Water bath calorimetry was used to demonstrate one more peculiar phenomenon associated with a certain class of mixed gas plasmas termed resonant transfer, or RT plasmas. Specifically, He/H2 (10%) (500 mTorr), Ar/H2 (10%) (500 mTorr), and H2O(g) (500 and 200 mTorr) plasmas generated with an Evenson...
Repository : arXiv
Language(s) : Undetermined

Visual Observation and Quantitative Measurement of the Microwave Absorbing Effect at X band

Author(s) : Zhao, L. , Chen, X. , Ong, C. K.
Description : We have setup a simple field mapping measure system to describe graphically the 2D quasi-free-space electromagnetic wave in a parallel plate waveguide at the X-band frequencies. Our apparatus illustrates a potential application in characterizing the microwave absorbing materials. The visual demons...
Repository : arXiv
Language(s) : Undetermined

INVESTIGATION OF ATTENUATION OF SHOCK WAVES IN LY12-M ALUMINUM BY POSITRON ANNIHILATION

Author(s) : Tang, W. , Zhang, R. , Chen, X.
Description : The rule of attenuation of planar shock waves in LY12-M aluminum was measured with manganin piezoresistive gages. The initial amplitude of the shock wave pressure is 4.92 GPa. Both positron lifetime measurements and Vickers microhardness measurements were performed. The Influence of dislocations and...
Repository : HAL - Hyper Article on Line
Language(s) : English

Field Theory of Finite-Size Effects in O(n) symmetric systems

Author(s) : Chen, X. , Dohm, V. , Esser, A.
Description : We propose a new perturbation approach to finite-size effects near the critical point within the ϕ4 field theory for an n-component order parameter with periodic boundary conditions. Our approach is applicable both above and below Tc. Calculations of finite-size scaling functions of the specific hea...
Repository : HAL - Hyper Article on Line
Language(s) : English

Finite-bias electronic transport of molecules in water solution

Author(s) : Rungger, I. , Chen, X. , Schwingenschlögl, U. , Sanvito, S.
Description : The effects of water wetting conditions on the transport properties of molecular nano-junctions are investigated theoretically by using a combination of classical molecular dynamics and first principles electronic transport calculations. These are at the level of the non-equilibrium Green's functi...
Repository : arXiv
Language(s) : Undetermined
1 2 3 4 5 > >>

Found 162 documents, displaying page 1 of 17