Recent content by ENDLESSYOU

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    Graduate Calculating Electric Fields for H Atom Ionization with SFA

    Hi! I have some trouble with atomic unit. I have a laser pulse with the wavelength of ##800 nm## at the peak intensity of ##1.0*10^{14} W/cm^{2}##. I'd like to calculate the corresponding electric field ##E_0##. I use the formula ##I=0.5Cε_0{E_{0}}^2## and ##1 a.u.=5.14*10^{11} V/m## to obtain...
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    Graduate Why Does the Lone Electron in Silver Have Zero Orbital Angular Momentum?

    It's in the ground state, so that it has zero orbital angular momentum.
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    Graduate Why Does the Lone Electron in Silver Have Zero Orbital Angular Momentum?

    "There are 47 electrons surrounding the silver atom nucleus, of which 46 form a closed inner core of total angular momentum zero – there is no orbital angular momentum, and the electrons with opposite spins pair off, so the total angular momentum is zero, and hence there is no magnetic moment...
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    Graduate Quantum amplitudes versus probability

    The probability is one dimensional real number, while the probability ampilitude is two dimensional complex number. It is this two dimension makes it possible for the phenomenon like interference which needs the concept of phase. If we add two probability together, there won't be such...
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    Introducing V-Gauge & L-Gauge: A Brief Introduction

    Can anyone give me a brief introduction? Thanks!
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    Graduate Preferred direction about hydrogen atom

    Thanks for your interpretation in a mathematical way!
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    Graduate Preferred direction about hydrogen atom

    Thanks! But I still have some problems. 1. If there are several free atoms, their z-axes may be in different directions? 2. This arbitary direction is physically existence or just a mathematical construct? 3. The solutions with same n and l have different probability density, but when we add...
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    Graduate Preferred direction about hydrogen atom

    When solving the three dimensional Schrödinger equation, we obtain a probability distribution on θ. But it seems like the procudure produces a particular direction the z-axis. While the Coulomb field is spherical symmetric, it shouldn't exist such a preferred direction. I'm puzzled.
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    Graduate A physical example approximating the idealized situation

    From Quantum Physics of Atoms, Molecules, Solids, Nuclei, and Particles, Eisberg-Resnick: "A physical example approximating the idealized situation represented by these wave functions would be a proton moving in a highly monoenergetic beam emerging from a cyclotron. Such beams are used to...
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    Undergrad Quantization of Energy: Planck's Constant & Standing Waves

    Thanks!
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    Undergrad Quantization of Energy: Planck's Constant & Standing Waves

    I have a basic problem about Planck's quantization of energy, ε=hv. It's said that we can only get the integer product of hv, that's the quantilization. But when we plug in v, we can plug any continuous value? Does that mean a particular standing wave in a capacity is specifield a particular v...
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    MATLAB Matlab vs Mathematica for DiffEqs: Accuracy?

    They're stiff differential equations so ode15s might be a better choice. In my experience, MATLAB is more 'stable' than Mathematica. I once executed a same nb file on Windows and Ubuntu, but I got two different results.
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    Unexpected operator for 'plotinequality'

    Thanks. I can use 'mphandle = mupad' to create a MuPAD notebook, and input the syntax.
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    Unexpected operator for 'plotinequality'

    My version is R2012b, and I just copied the codes form the examples on the webpage. But it failed. It seems like the problem is about '::'.
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    MATLAB Matlab vs Mathematica for DiffEqs: Accuracy?

    Thanks. I'm dealing with the restricted circular three-body problem and solving the differential equations though numerical methods, ode15s on MATLAB and NDSolve on mathematica.