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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Energy/dissipation-preserving split Birkhoffian multi-symplectic methods for Maxwell’s equations
麦克斯韦方程组 能量/耗散守恒分裂 Birkhofian 多辛方法
2023/5/18
We propose a novel kind of energy/dissipation-preserving split Birkhoffian multi-symplectic (S-BMS) methods for Maxwell's equations with dissipation terms. After investigating the non-autonomous and a...
Low Energy Tests of Chiral Symmetry1
Low energy chiral invariance perturbation theory the pion
2014/12/23
The present status of low energy test of chiral invariance via chiral perturbation theory is reviewed, both in the meson and baryon sectors, and future prospects are discussed.
Low energy Compton scattering and nucleon structure
Virtual Compton scattering low energy high resolution generalized measuring polarization baryon chiral perturbation theory
2014/12/22
The low energy virtual Compton scattering process eN\rightarrow e'N\gamma offers a new and potentially high resolution window on nucleon structure via measurement of so-called generalized polarizabili...
A positive energy theorem for asymptotically de Sitter spacetimes
DE sitter spacetime conserved DE sitter universe spinor and energy
2014/12/22
We construct a set of conserved charges for asymptotically de Sitter spacetimes that correspond to asymptotic conformal isometries. The charges are given by boundary integrals at spatial infinity in t...
The Renormalization of the Energy-momentum Tensor for an Effective Initial State
The new physics quantum state their differences
2014/12/20
An effective description of an initial state is a method for representing the signatures of new physics in the short-distance structure of a quantum state. The expectation value of the energy-momentum...
Energy fluctuations, hydrodynamics and local correlations in harmonic systems with bulk noises
Energy fluctuations hydrodynamics local correlations harmonic systems Mathematical Physics
2012/6/12
In this note, I summarise and comment on joint work with C. Bernardin, V. Kannan and J. L. Lebowitz concerning two harmonic systems with bulk noises whose nonequilibrium steady states (NESS) are nearl...
Solvable K-essence Cosmologies and Modified Chaplygin Gas Unified Models of Dark Energy and Dark Matter
Solvable K-essence Cosmologies Modified Chaplygin Gas Unified Models of Dark Energy Dark Matter
2012/4/20
This paper is devoted to the investigation of modified Chaplygin gas model in the context of solvable k-essence cosmologies. For this purpose, we construct equations of state parameter of this model f...
Analytical Modelling of a Plucked Piezoelectric Bimorph for Energy Harvesting
Analytical Modelling of a Plucked Piezoelectric Bimorph Energy Harvesting Classical Physics
2012/4/19
Energy harvesting (EH) is a multidisciplinary research area, involving physics, materials science and engineering, with the objective of providing renewable sources of sufficient power to operate targ...
Magnetized dark energy and the late time acceleration
Magnetized dark energy the late time acceleration
2012/4/19
In the present work we have searched the existence of the late time acceleration of the Universe. The matter source that is responsible for the late time acceleration of the Universe consists of cosmi...
Logical Construction of the Ionization Energy Theory and the Origin of Physical Categories
Logical Construction the Ionization Energy Theory the Origin of Physical Categories General Physics
2012/5/31
Logical proofs and definitions are developed to establish (i) the energy-level spacings, \xi for each chemical element (from the periodic table of chemical elements) can be converted to the ionization...
A solution of the non-uniqueness problem of the Dirac Hamiltonian and energy operators
non-uniqueness problem Dirac Hamiltonian energy operators General Relativity and Quantum Cosmology
2011/10/9
Abstract: In a general spacetime, the possible choices for the field of orthonormal tetrads lead (in standard conditions) to equivalent Dirac equations. However, the Hamiltonian operator is got from r...
Ultra High Energy Particles
High Energy Particles temporal order Heisenberg's Uncertainty Principle Quantum Mechanical equations
2011/8/11
Abstract: We revisit considerations of temporal order in relativistic effects, taking into account Heisenberg's Uncertainty Principle. We then use a formulation of relativistic Quantum Mechanical equa...
Notes on dark energy interacting with dark matter and unparticle in loop quantum cosmology
Notes dark energy dark matter unparticle loop quantum cosmology
2011/8/3
Abstract: We investigate the behavior of dark energy interacting with dark matter and unparticle in the framework of loop quantum cosmology. In four toy models, we study the interaction between the co...
Gedanken experiments with Casimir forces, vacuum energy, and gravity
Casimir force quantum vacuum gravity mass
2011/8/2
Gedanken experiments with Casimir forces, vacuum energy, and gravity.
Negative Cosmological Energy Indicated by Supernova Redshift-Luminosity Correlation
Negative Cosmological Energy Supernova Redshift-Luminosity General Relativity and Quantum Cosmology
2011/8/2
Abstract: Milne's classical homogeneous-universe cosmology predicts a product of Hubble constant with luminosity distance that equals z + z2/2, where z is redshift. Supernova-data's support of this un...