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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：The level-set percolation of Gaussian free field
高斯自由场 水平 集渗流
2023/5/17
In this lecture, I will discuss some of the recent progresses in the level-set percolation of Gaussian free field in (d\geq 3), including the positivity of threshold and (if time permits) sharp phase ...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars： The level-set percolation of Gaussian free field
高斯自由场 水平集渗流 随机交错
2023/5/18
In this lecture, I will discuss some of the recent progresses in the level-set percolation of Gaussian free field in (d\geq 3), including the positivity of threshold and (if time permits) sharp phase ...
UCF Researchers Set Record for Fastest Light Pulse— Again（图）
UCF Researchers Set Record Fastest Light Pulse
2017/9/4
A research team at the University of Central Florida has demonstrated the fastest light pulse ever developed, a 53-attosecond X-ray flash.The group led by Professor Zenghu Chang beat its own record se...
The experimental set-valued index of refraction of dielectric and anelastic media
dielectric anelastic splitting index of refraction
2015/9/28
The dielectric parameter, in the generalised Debye form, of all studied substances (Cole and Cole, 1941) contains a rational power of the imaginary frequency which implies that the index of refraction...
UC Berkeley, scientists have proved a fundamental relationship between energy and time that sets a “quantum speed limit” on processes ranging from quantum computing and tunneling to optical switching....
Complete universal quantum gate set approaching fault-tolerant thresholds with superconducting qubits
Complete universal quantum gate set fault-tolerant thresholds superconducting qubits
2012/2/27
We use quantum process tomography to characterize a full universal set of all-microwave gates on two superconducting single-frequency single-junction transmon qubits. All extracted gate fidelities, in...
A complete set of multidimensional Bell inequalities
multidimensional Bell inequalities Quantum Physics
2011/9/30
Abstract: We give a multidimensional generalisation of the complete set of Bell-correlation inequalities given by Werner and Wolf for the two-dimensional case. Our construction applies for the n parti...
A new limit on Lorentz-violating tensor interactions set using $^{21}$Ne-Rb-K comagnetometer
Lorentz-violating 21Ne-Rb-K comagnetometer
2011/8/29
We develop a comagnetometer using 21Ne atoms with nuclear spin I = 3=2 and Rb atoms polarized by spin-exchange with K atoms to search for tensor interactions that violate local Lorentz invariance.We f...
How specific exponential type orbitals recently became a viable basis set choice in NMR shielding tensor calculation
exponential type orbitals recently viable basis set choice NMR shielding tensor calculation
2010/11/8
This paper advocates use of the atomic orbitals which have direct physical interpretation, i.e. Coulomb Sturmians and hydrogen-like orbitals. They are exponential type orbitals (ETOs). Their radial n...
Gaussian flexibility with Fourier accuracy: the periodic von Neumann basis set
Gaussian flexibility Fourier accuracy Neumann basis set
2010/11/5
We propose a new method for solving quantum mechanical problems, which combines the flexibility of Gaussian basis set methods with the numerical accuracy of the Fourier method. The method is based on ...
基于二维查找表的SET耦合注入方法
单粒子瞬态 二维查找表 混合模拟
2011/8/19
随着器件特征尺寸的减小，利用独立电流源进行单粒子瞬态（Single Event Transient，SET）注入的方法与实际脉冲存在很大误差，器件/电路混合模拟能与实际较好符合，但在大规模组合逻辑的软错误率分析中使用器件/电路混合模拟非常耗时，急需电路级快速的SET注入方法。针对0.18 μm CMOS反相器构建了基于二维查找表的SET耦合注入方法，并与器件/电路混合模拟的结果进行比较。结果发现：...
On a class of $J$-self-adjoint operators with empty resolvent set
Krein spaces J-self-adjoint operators empty resolvent
2010/10/21
In the present paper we investigate the set J of all J-self-adjoint extensions of a symmetric operator S with deficiency indices < 2, 2 > which commutes with a non-trivial fundamental symmetry J of a...
A one parameter family of retarded linear operators on scalar fields on causal sets is introduced. When the causal set is well-approximated by 4 dimensional Minkowski spacetime, the operators are Lore...
Nucleon internal structure: a new set of quark, gluon momentum, angular momentum operators and parton distribution functions
nucleon internal structure quark-gluon momentum and angular momentum canonical commutation relation gauge invariance
2009/11/17
It is unavoidable to deal with the quark and gluon momentum and angular momentum contributions to the nucleon momentum and spin in the study of nucleon internal structure. However we never have the qu...
Nanotubes set to shine for solar energy（图）
nanotubes solar energy photovoltaic technologies
2009/9/15
Carbon nanotubes could be used to produce solar cells that generate more electrical current per photon than existing photovoltaic technologies, according to scientists in the US. The team has shown th...